HomeMy WebLinkAboutOrdinance - 2024-O0026 - 2021 International Plumbing Code, Amending Article 28.10 - 03/26/2024First Reading
March 5, 2024
Item No. 6.2
ORDINANCE NO. 2024-00026
Second Reading
March 26, 2024
Item No. 5.33
AN ORDINANCE AMENDING ARTICLE 28.10 OF THE CODE OF ORDINANCES OF
THE CITY OF LUBBOCK, TEXAS WITH REGARD TO ADOPTION OF THE 2021
INTERNATIONAL PLUMBING CODE AND PROVIDING FOR CERTAIN
AMENDMENTS THERETO TO MEET LOCAL CONDITIONS; PROVIDING A
PENALTY; PROVIDING A SAVINGS CLAUSE; PROVIDING FOR PUBLICATION;
AND PROVIDING AN EFFECTIVE DATE.
WHEREAS the City Council of the City of Lubbock, Texas deems it in the best interest of the
health, safety, and welfare of the citizens of Lubbock to adopt the 2021 International Plumbing
Code for the City of Lubbock with certain amendments thereto to meet local conditions; NOW
THEREFORE:
BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF LUBBOCK:
SECTION 1. THAT Article 28.10 of the Code of Ordinances of the City of Lubbock is hereby
amended to read as follows:
ARTICLE 28.10
INTERNATIONAL PLUMBING CODE
Division 1
Generally
§ 28.10.001 Adopted.
The 2021 edition of the International Plumbing Code, as published by the International
Code Council, Inc., as hereinafter amended, including appendices C, D, E, and F is
hereby adopted as the plumbing code of the City of Lubbock, Texas. A copy of said
plumbing code is attached hereto and incorporated herein as though set out herein in
detail. References to the plumbing code in this chapter shall mean the 2021 edition of
the International Plumbing Code. One copy of the 2021 International Plumbing Code
shall be filed with the city secretary and a copy shall be maintained in the office of the
city building official. All such copies, with the amendments thereto, shall be open to
public inspection during the usual hours of business of the offices where they are
maintained.
§ 28.10.002 Coordination of administrative provisions.
The administrative provisions contained in Chapter 28, articles 28.01 through 28.08 of
this Code of Ordinances are applicable to this article; however, for purposes of
administering provisions related more specifically to the regulation of plumbing
systems installation, these supplemental administrative provisions have been provided.
Except as amended or supplemented within Sections 28.10.002, 28.10.003, and
28.10.051 through 28.10.056, the entire text of Chapter 1 of the 2021 International
Plumbing Code is deemed to be incorporated herein as though set out herein in detail.
Where a conflict arises between a provision contained within Sections 28.10.002,
28.10.003, and 28.10.051 through 28.10.056 and articles 28.01 through 28.08 of this
Code of Ordinances, it is the intent that the more specific shall govern, as determined by
the building official.
§ 28.10.003 Supplemental administrative amendments.
(a) Administrative amendments and cross-references to a_rticles 28.01 throu�h
28.08. The following administrative provisions within Chapter 1 of the International
Plumbing Code are hereby stricken, and the corresponding provisions within articles
28.01 through 28.08 of this Code of Ordinances shall govern, as indicated in Table
28.10.003 below:
TABLE 28.10.003
ADMINISTRATIVE PROVISIONS CROSS-REFERENCE
2021 International
Plumbing Code
Section
109.6
115.4
116.1
113
114
§ 28.10.004 Amendments.
Section
Heading/Subject
Fee refunds
Violation penalties
Stop work orders
Means of appeal
Board of Appeals
Refer to Lubbock Code of
Ordinances Chapter Section
28.05.109
28.02.006
28.02.007
2.03.495-2.03.501
2.03.491-2.03.494
(a) Protection against physical dama�e. Section 305.6 is hereby amended to read as
follows:
305.6 Protection against physical damage. In concealed locations where piping,
other than cast iron or galvanized steel, is installed through holes or notches in
studs, joists, rafters or similar members less than 1.5 inches (38 mm) from the
nearest edge of the member, the pipe shall be protected by steel shield plates.
Such shield plates shall have a thickness of not less than 0.0575 inch (1.463
mm) (No. 16 gage). Such plates shall cover the area of the pipe where the
2
member is notched or bored.
(b) Over-excavation. Section 306.2.1 is hereby amended to read as follows:
306.2.1 Over-excavation. Where trenches are excavated below the installation
level of the pipe such that the bottom of the trench does not form the bed for thc
pipe, the trench shall be backfilled to the installation level of the bottom of the
pipe placed in layers of 6 inches (152 mm) maximum depth and such backfill
shall be compacted after each placement. The backfill material may consist of
sand or fine gravel, or excavated material that complies with Section 306.3.
(c) Drainage and vent water test. Section 312.2 is hereby amended to read as
follows:
312.2 Drainage and vent water test. A water test shall be applied to the drainage
system either in its entirety or in sections. If applied to the entire system, all
openings in the piping shall be tightly closed, except the highest opening, and
the system shall be filled with water to point of overflow. If the system is tested
in sections, each opening shall be tightly plugged except the highest openings of
the section under test, and each section shall be filled with water, but no section
shall be tested with less than a 5-foot (1524 mm) head of water above floor
height. In testing successive sections, at least the upper 10 feet (3048 mm) of the
next preceding section shall be tested so that no joint or pipe in the building,
except the uppermost 10 feet (3048 mm) of the system, shall have been
submitted to a test of less than a 5-foot head of water above floor height. Thc
water shall be held kept in the system, or in the portion under test, for at least 15
minutes before inspection starts. The system shall then be tight at all points.
(d) Gravity sewer test. Section 312.6 is hereby amended to read as follows:
312.6 Gravity sewer test. Gravity sewer tests shall consist of plugging the end of
the building sewer at the point of connection with the public sewer, filling the
building sewer with water, testing with not less than a 5-foot (1524 mm) head of
water and maintaining such pressure for 15 minutes.
(e) Ductless mini-split system traps. Section 314.2.4.1 is hereby deleted in its
entirety.
(� Sheet lead. Section 402.4 is hereby amended to read as follows:
402.4 Sheet lead. Sheet lead for pans shall not weigh less than two and one-half
(2-1/2) pounds per square foot (12.2 kg/m2) and shall be coated with an asphalt
paint or other approved coating.
(g) Sheet lead. Section 421.5.2.3 is hereby amended to read as follows:
421.5.2.3 Sheet lead. Sheet lead shall weigh not less than two and one-half (2-
1/2) pounds per square foot (12.2 kg/m2) and shall be coated with an asphalt
paint or other approved coating. The lead sheet shall be insulated from
conducting substances other than the connecting drain by 15-pound (6.80 kg)
asphalt felt or an equivalent. Sheet lead shall be joined by burning.
(h) Water hammer. Section 604.9 is hereby amended to read as follows:
604.9 Water hammer. The flow velocity of the water distribution system shall bc
controlled to reduce the possibility of water hammer. An air chamber or a water-
hammer arrestor shall be installed where quick-closing valves are utiliced, unless
otherwise approved. Water-hammer arrestors shall be installed in accordance
with the manufacturer's instructions. Water-hammer arrestors shall conform to
ASSE 1010.
(i) Solvent cementin�. Section 605.21.3 is hereby amended to read as follows:
605.21.3 Solvent cementin�. Joint surfaces shall be clean and free from
moisture. A purple primer that conforms to ASTM F656 shall be applied. Clear
primer in lieu of purple is acceptable where joints are accessible. Solvent cement
not purple in color and conforming to ASTM D2564 or CSA CAN/CSA-B 137.3
shall be applied to all joint surfaces. The joint shall be made while the cement is
wet and shall be in accordance with ASTM D2855. Solvent-cement joints shall
be permitted above or below ground.
(j) Location of full-open valves. Section 606.1 is hereby amended to read as
follows:
606.1 Location of full-open valves, Full-open valves shall be installed in the
following locations:
1. On the building water service pipe from the public water supply.
2. On the water distribution supply pipe at the entrance into the structure if
the water meter is more than 100 feet from the building.
3. On the water supply pipe to a gravity or pressurized water tank.
4. On the water supply pipe to every water heater.
(k) Location of shutoff valves. Section 606.2 is hereby amended to read as follows:
606.2 Location of shutoff valves. Shutoff valves shall be installed in the
following locations:
On the fixture supply to each plumbing fixture in other than bathtubs and
showers in one- and two-family and multiple-family residential
occupancies, and other than in individual sleeping units that are provided
4
with unit shutoff valves in hotels, motels, boarding houses and similar
occupancies.
(1)
2. On the water supply pipe to each appliance or mechanical equipment.
Slope of horizontal draina�e nipe. Table 704.1 is hereby amended to read as
follows:
TABLE 704.1
SLOPE OF HORIZONTAL DRAINAGE PIPE
Size
(inches)
2-112 orless
3to5
6 orlarger
Minimum slope
(inch per foot)
114a
118a
1116a
a. Slopes for piping draining to a grease interceptor shall comply with
Section 704.1.
(m)
Solvent cementin�. Section 705.10.2 is hereby amended to read as follows:
705.10.2 Solvent cementin�. Joint surfaces shall be clean and free from
moisture. A purple primer that conforms to ASTM F656 shall be applied. Clear
primer in lieu of purple primer is acceptable where joints are accessible. Solvent
cement not purple in color and conforming to ASTM D2564 CSA CAN/CSA-
B 137.3, CSA CAN/CSA-B 181.2 or CSA CAN/CSA-BV 182.1 shall be applicd
to all joint surfaces. The joint shall be made while the cement is wet and shall bc
in accordance with ASTM D2855. Solvent-cement joints shall be permitted
above or below ground.
Exception: A primer is not required where both of the following conditions
apply:
The solvent cement used is third-party certified as conforming to ASTM
D2564.
2. The solvent cement is used only for joining PVC drain, waste and vent
pipe and fittings in non-pressure applications in sizes up to and including
4 inches (102 mm) in diameter.
(n) Installation of fittin�s. Section 706.3 is hereby amended to read as follows:
706.3 Installation of fittin�s. Fittings shall be installed to guide sewage and
waste in the direction of flow. Change in direction shall be made by fittings
installed in accordance with Table 706.3. Change in direction by combination
fittings, side inlets or increasers shall be installed in accordance with Table
706.3 based on the pattern of flow created by the fitting. Double sanitary tee
patterns shall not receive the discharge of back-to-back water closets and
fixtures or appliances with pumping action discharge.
(o) Buildin� drains and sewers. Table 710.1(1) is hereby amended to read as
follows:
Table 710.1(1)
BUILDING DRAINS AND SEWERS
MAXIMUM NUMBER OF DRAINAGE FIXTURE UNITS
CONNECTED TO ANY PORTION OF THE BUILDING
DIAMETER DRAIN OR THE BUILDING SEWER, INCLUDING
OF PIPE BRANCHES OF THE BUILDING DRAINa
(inches) Slope per foot
1/16 inch 1/8 inch 1/4 inch 1/2 inch
1-1/4 - - 1 1
1-1/2 - - 3 3
2 - - 21 26
2-1 /2 - - 24 31
3 - 36 42 50
4 - 180 216 250
5 - 390 480 575
6 620 700 840 1000
8 1400 1600 1920 2300
10 2500 2900 3500 4200
0
Table 710.1(1)
BUILDING DRAINS AND SEWERS
MAXIMUM NUMBER OF DRAINAGE FIXTURE UNITS
CONNECTED TO ANY PORTION OF THE BUILDING
DIAMETER DRAIN OR THE BUILDING SEWER, INCLUDING
OF PIPE BRANCHES OF THE BUILDING DRAINa
(inches) Slope per foot
1/16 inch 1/8 inch 1/4 inch 1/2 inch
12 3900 4600 5600 6700
15 7000 8300 10,000 12,000
a. The minimum size of any building drain serving a water closet shall be 3
inches.
(p) Permit requirements. Section 716.1.1 is hereby added to read as follows:
716.1.1 Permit requirements. A licensed plumbing contractor shall obtain a
permit under this code prior to the work being performed. The permit
application shall indicate if work in the City right-of-way will be necessary. If
issued, the permit will grant the licensed plumbing contractor temporary
"permitted user" status, as contemplated by Chapter 37 of the Lubbock Code of
Ordinances, for limited access to the City right-of-way. Excavation in the City
right-of-way subjects the permittee to all applicable requirements of Chaptcr 37
as well as this code, save and except the requirement for a separate right-of-way
permit. The limited access is restricted to unpaved areas only and is defined as
an excavation that is hand-dug only (no mechanical excavation) and no morc
than three (3') feet in width adjacent to the property line. The licensed plumbing
contractor has the option of hiring a"permitted user", as anticipated by Chapter
37, to perform the work in the public right-of-way.
(q) Permit requirements. Section 717.1.1 is hereby added to read as follows:
717.1.1 Permit requirements. A licensed plumbing contractor shall obtain a
permit under this code prior to the work being performed. The permit
application shall indicate if work in the City right-of-way will be necessary. If
issued, the permit will grant the licensed plumbing contractor temporary
"permitted user" status, as contemplated by Chapter 37 of the Lubbock Code of
Ordinances, for limited access to the City right-of-way. Excavation in the City
right-of-way subjects the permittee to all applicable requirements of Chapter 37
7
as well as this code, save and except the requirement for a separate right-of-way
permit. The limited access is restricted to unpaved areas only and is defined as
an excavation that is hand-dug only (no mechanical excavation) and no more
than three (3') feet in width adjacent to the property line. The licensed plumbing
contractor has the option of hiring a"permitted user", as anticipated by Chapter
37, to perform the work in the public right-of-way.
(r) Permit requirements. Section 718.1.1 is hereby added to read as follows:
718.1.1 Permit requirements. A licensed plumbing contractor shall obtain a
permit under this code prior to the work being performed. The permit
application shall indicate if work in the City right-of-way will be necessary. If
issued, the permit will grant the licensed plumbing contractor temporary
"permitted user" status, as contemplated by Chapter 37 of the Lubbock Code of
Ordinances, for limited access to the City right-of-way. Excavation in the City
right-of-way subjects the permittee to all applicable requirements of Chaptcr 37
as well as this code, save and except the requirement for a separate right-of-way
permit. The limited access is restricted to unpaved areas only and is defined as
an excavation that is hand-dug only (no mechanical excavation) and no more
than three (3') feet in width adjacent to the property line. The licensed plumbing
contractor has the option of hiring a"permitted user", as anticipated by Chapter
37, to perform the work in the public right-of-way.
(s) Roof extension un rotected. Section 903.1.1 is hereby amended to read as
follows:
903 :1,1 Roof extension unprotected. Open vent pipes that extend through a roof
shall be terminated not less than 10 inches (254 mm) above the roof.
(t) 1001.1 Sco�re {Traps, Interce�tors and Separators}_ Section 1001.1 is hereby
amended to read as follows:
1001.1 Scope. This chapter shall govern the material and installation of traps,
interceptors and separators. See also divisions 5 and 6 of article 22.04
(wastewater system) of the Lubbock Code of Ordinances.
(u) Storm draina�e-general �tests� Section 1101.4 is hereby amended to read as
follows:
1101.4 Tests. The building storm drain shall be tested in accordance with
Section 312 and within the building only and shall not require 5-foot head, but
roof drain level only.
(v) Roof desi�n. Section 1101.7 is hereby amended to read as follows:
1101.7 Roof design. Roofs shall be designed for the maximum possible depth of
water that will pond thereon as determined by the relative levels of roof deck
and overflow weirs, scuppers, edges or serviceable drains in combination with
the deflected structural elements in accordance with Section 1611 of the
International Building Code. In determining the maximum possible depth of
water, all primary roof drainage means shall be assumed to be blocked. The
maximum possible depth of water on the roof shall include the height of the
water required above the inlet of the secondary roof drainage means to achieve
the required flow rate of the secondary drainage means to accommodate the
design rainfall as required by Section 1106.
(w) Strainers. A new Section 1105.3 is hereby added to read as follows:
1105.3 Strainers. Roof drains shall have strainers extending not less than 4
inches (102 mm) above the surface of the roof immediately adjacent to the roof
drain. Strainers shall have an available inlet area, above roof level, of not less
than one and one-half times the area of the conductor or leader to which the
drain is connected.
(x) rlat decks. A new Section 1105.4 is hereby added to read as follows:
1105.4 Flat decks. Roof drain strainers for use on sun decks, parking decks and
similar areas that are normally serviced and maintained shall comply with
Section 1105.3 or shall be of the flat-surface type, installed level with the deck,
with an available inlet area not less than two times the area of the conductor or
leader to which the drain is connected.
(y) Size of conductors leaders and storm drains. Section 1106 is hereby deleted and
replaced with the following:
SECTION 1106
SIZE OF CONDUCTORS, LEADERS AND STORM DRAINS
1106.1 General. The size of the vertical conductors and leaders, building storm
drains, building storm sewers, and any horizontal branches of such drains or
sewers in Lubbock, Texas, shall be based on a minimum 100-year hourly
rainfall rate of 3.3 inches (84 mm) per hour.
1106.2 Vertical conductors and leaders. Vertical conductors and leaders shall be
sized for the maximum projected roof area, in accordance with Table
L 1106.2(1) and Table L 1106.2(2).
TABLE L1106.2(1)
SIZE OF CIRCULAR VERTICAL CONDUCTORS AND LEADERS
Horizontally Projected Roof Area (square feet)
Diameter of leader Rainfall Rate (inches per hour)
(inches)a 3 3.3 4
2 960 888 720
3 2,930 2,711 2,200
4 6,130 5,671 4,600
5 11,530 10,666 8,650
6 17,995 16,647 13,500
8 38,660 35,762 29,000
a. Sizes indicated are the diameter of circular piping. This table is applicable
to piping of other shapes, provided the cross-sectional shape fully
encloses a circle of the diameter indicated in this table. For rectangular '
leaders, see Table L1106.2(2). Interpolation is permitted for pipe sizes
that fall between those listed in this table. �
b. The Rate of Rainfall for Lubbock, Texas, is 3.3 inches per hour, as shown
in Appendix B of the 2021 International Plumbing Code.
TABLE L1106.2(2)
SIZE OF RECTANGULAR VERTICAL CONDUCTORS AND LEADERS
Dimensions Of Common Horizontally Projected Roof Area (square feet)
Leader Sizes width x
length Rainfall Rate (inches per hour)
(inches)a�b 3
1-3/4 X 2-1/2 1,130
2 x 3 1,840
3.3
1,046
1,702
4
850
1,380
10
TABLE L1106.2(1)
SIZE OF CIRCULAR VERTICAL CONDUCTORS AND LEADERS
Horizontally Projected Roof Area (square feet)
Diameter of leader R' f ll R t ' h h
a
L7
ain a a e(inc es per our)
(inches)a 3 3.3 4
2-3/4 X 4-114 4,270 3,949 3,200
3 x 4 4,400 4,070 3,300
3-1/2 X 4 5,300 4,901 3,970
3-1/2 X 5 7,100 6,566 5,320
3-1/4 X 4-3/4 7,320 6,771 5,490
3-3/4 X 5-1/4 8,500 7,864 6,380
3-1/2 X 6 9,260 8,564 6,940
4 x 6 10,990 10,165 8,240
5-1/2 X 5-1/2 14,760 13,653 11,070
7-1/2 X 7-1/2 33,500 30,986 25,120
Sizes indicated are nominal width x length of the opening for rectangular
piping.
For shapes not included in this table, Equation 11-1 shall be used to
determine the equivalent circular diameter, De, of rectangular piping for
use in interpolation using the data from Table L 1106.2(1).
De =(width x length) 112 (Equation 11-1)
where:
De = equivalent circular diameter; De, width, and length are in inches.
c. The Rate of Rainfall for Lubbock, Texas, is 3.3 inches per hour, as shown
11
TABLE L1106.2(1)
SIZE OF CIRCULAR VERTICAL CONDUCTORS AND LEADERS
Horizontally Projected Roof Area (square feet)
Diameter of leader Rainfall Rate (inches per hour)
(inches)a 3 3.3 4
in Appendix B of the 2021 International Plumbing Code.
1106.3 Buildin = storm drains and sewers. The size of the building storm drain,
building storm sewer and their horizontal branches having a slope of one-half
unit or less vertical in 12 units horizontal (4-percent slope) shall be based on the
maximum projected roof area in accordance with Table Ll 106.3. The slope of
horizontal branches shall be not less than one-eighth unit vertical in 12 units
horizontal (1-percent slope) unless otherwise approved.
TABLE L1106.3
SIZE OF HORIZONTAL STORM DRAINAGE PIPING
Horizontally Projected Roof Area (square feet)
Size of Horizontal
Piping Rainfall Rate (inches per hour)
(inches) 3 3.3 4
1/8 unit vertical in 12 units horizontal (1 percent slope)
3 1,096 1,014 822
4
5
6
8
10
12
2,506
4,453
7,133
15,330
27,600
44,400
2,294
4,119
6,598
14,181
25,530
41,070
1,800
3,340
5,350
11,500
20,700
33,300
12
TABLE L1106.3
SIZE OF HORIZONTAL STORM DRAINAGE PIPING
Horizontally Projected Roof Area (square feet)
Size of Horizontal
Piping Rainfall Rate (inches per hour)
(inches) 3 3.3 4
15 72,800 68,810 59,500
1/4 unit vertical in 12 units horizontal (2 percent slope)
3 1,546 1,430 1,160
4 3,533 3,268 2,650
5 6,293 5,821 4,720
6 10,066 9,311 7,550
8 21,733 20,103 16,300
10 38,950 36,025 29,200
12 62,600 57,920 47,000
15 112,000 103,600 84,000
1/2 unit vertical in 12 units horizontal (4 percent slope)
3 2,295 2,100 1,644
4 5,010 4,635 3,760
5 8,900 8,234 6,680
6 13,700 12,800 10,700
8 30,650 28,355 23,000
10 55,200 51,060 41,400
Z�
TABLE L1106.3
SIZE OF HORIZONTAL STORM DRAINAGE PIPING
Horizontally Projected Roof Area (square feet)
Size of Horizontal
Piping Rainfall Rate (inches per hour)
(inches) 3 3.3 4
12 88,800 82,140 66,600
15 158,800 146,860 119,000
The rate of rainfall for Lubbock, Texas, is 3.3 inches per hour, as shown in
appendix B of the 2021 International Plumbing Code.
1106.4 Vertical walls. In sizing roof drains and storm drainage piping, one-half
of the area of any vertical wall that diverts rainwater to the roof shall be added to
the projected roof area for inclusion in calculating the required size of vertical
conductors, leaders and horizontal storm drainage piping.
1106.5 Parapet wall scupper location. Parapet wall roof drainage scupper and
overflow scupper location shall comply with the requirements of Section 1502
of the International Building Code.
1106.6 Size of roof gutters. The size of semicircular gutters shall be based on the
maximum projected roof area in accordance with Table L1106.6.
TABLE L1106.6
SIZE OF SEMICIRCULAR ROOF GUTTERS
Horizontally Projected Roof Area (square feet)
Diameter of Gutters Rainfall Rate (Inches per hour)
(inches) 3 3.3 4
1/16 unit vertical in 12 units horizontal (0.5 percent slope)
3 226 209 170
4 480 444 360
14
TABLE L1106.6
SIZE OF SEMICIRCULAR ROOF GUTTERS
Horizontally Projected Roof Area (square feet)
Diameter of Gutters Rainfall Rate (Inches per hour)
(inches) 3 3.3 4
5 834 771 625
6 1,280 1,184 960
7 1,840 1,702 1,380
8 2,655 2,456 1,990
10 4,800 4,440 3,600
1/8 unit vertical in 12 units horizontal (1 percent slope)
3 320 296 240
4 681 630 510
5 1,172 1,084 880
6 1,815 1,679 1,360
7 2,600 2,405 1,950
8 3,740 3,458 2,800
10 6,800 6,290 5,100
1/4 unit vertical in 12 units horizontal (2 percent slope)
3 454 420 340
4 960 888 720
5 1,668 1,543 1,250
15
TABLE L1106.6
SIZE OF SEMICIRCULAR ROOF GUTTERS
Horizontally Projected Roof Area (square feet)
Diameter of Gutters Rainfall Rate (Inches per hour)
(inches) 3 3.3 4
6 2,560 2,368 1,920
7 3,860 3,530 2,760
8 5,310 4,911 3,980
10 9,600 8,880 7,200
1/2 unit vertical in 12 units horizontal (4 percent slope)
3 640 592 480
4 1,360 1,258 1,020
5 2,360 2,183 1,770
6 3,695 3,418 2,770
7 5,200 4,810 3,900
8 7,460 6,902 5,600
10 13,330 12,331 10,000
The rate of rainfall for Lubbock, Texas, is 3.3 inches per hour, as shown in
appendix B of the 2021 International Plumbing Code.
(x) Secondar�[Emergency} Roof Drains. Section 1108 is hereby deleted and
replaced with the following:
SECTION 1108
SECONDARY (EMERGENCY) ROOF DRAINS
1108.1 Secondary {emergen� overflow, drains or scuppers. Where roof drains
16
are required, secondary (emergency overflow) roof drains or scuppers shall be
provided where the roof perimeter construction extends above the roof in such a
manner that water will be entrapped if the primary drains allow buildup for any
reason.
1108.2 Se arate s stems re uired. Secondary roof drain systems shall havc the
end point of discharge separate from the primary system. Discharge shall be
above grade, in a location that would normally be observed by the building
occupants or maintenance personnel.
1108.3 Sizin� of secondary drains. Secondary (emergency) roof drain systems
shall be sized in accordance with Section 1106 based on the rainfall rate for
which the primary system is sized in Tables L 1106.2(1), L 1106.2(2), L 1106.3
and L1106.6. Scuppers shall be sized to prevent the depth of ponding watcr from
exceeding that for which the roof was designed as determined by Section
1101.7. Scuppers shall be sized in accordance with Tables L1108.3(1) and
L1108.3(2) so that the rain load on the roof does not exceed 20 psf. Notify the
structural engineer when the roof and wall areas contributing to the scuppers
exceed the values shown in Table L1108.3(2) so that the structure can be
designed for increased rain load. Scuppers shall have an opening dimension of
not less than 4 inches (102 mm). The flow through the primary system shall not
be considered when sizing the secondary roof drain system.
TABLE L1108.3(1)
SIZE OF SCUPPERS
Length of Scupher, L (inches)
5" 6" 8" 10" 12" 18" 24" 30" 36"�
Head, H 4"
(inches) CAPACITY OF SCUPPER, Q(gallons per minute)
1" 11.4 14.4 17.4 23.4 29.4 35.4 53.3 71.3 89.3 107.3
1.846" 27.3 34.8 42.3 57.3 72.4 87.4 132.5 177.6 222.7 267.7.
17
TABLE L1108.3(1)
SIZE OF SCUPPERS
Length of Scupper, L (inches)
5" 6" 8" 10" 12" 18" 24" 30" 36"�
Head, H 4"
(inches) CAPACITY OF SCUPPER, Q(gallons per minute)
2" 30.5 39.0 47.5 64.4 81.4 98.3 149.1 200.0 250.8 301.7�
Note: The Table is based on the Francis weir formula:
Q==3.33 x(L-0.2xH)xH1.5
Where:
Q = Flow Rate (cubic feet per second)
L = Length of Scupper Opening (feet)
H = Head on Scupper (feet, measured 6 feet back from opening)
TABLE L1108.3(2)
MAXIMUM CONTRIBUTING AREAS FOR PARAPET WALL
SCUPPERS
For This Table: ds = 2", T= 3.3 in./hr., and Rain Load, R= 20 psf
Width of Scupper, L Maximum Contributing Roof and Wall Areas, A
(inches) (square feet)
4"
796
18
TABLE L1108.3(1)
SIZE OF SCUPPERS
Length of Scupper, L (inches)
5" 6" 8" 10" 12" 18" 24" 30" 36"�
Head, H 4"
(inches) CAPACITY OF SCUPPER, Q(gallons per minute)
5" 1015
6" 1234
7" 1453
8" 1673
10" 2111
12" 2549
16" 3426
24" 5179
A= Maximum allowable horizontally-projected roof areas plus one-half of the
vertical wall areas contributing to the roof drainage area so that the maximum
rain load on the roof, R, does not exceed 20 psf.
ds = Depth of rainwater from the primary roof drain up to the bottom of the
scupper inlet (also referred to as static head), inches. For this Table: ds = 2".
H= Maximum depth of additional rainwater above the bottom of the scupper
inlet (also referred to as Hydraulic Head), inches. For this Table: H= 1.846"
maximum.
(H = 20 psf/5.2 psf/in. of thickness - ds �-= 3.846" -2" = 1.846")
i= The rate of rainfall for Lubbock, Texas is 3.3 inches per hour, as shown in
Appendix B of the 2021 IPC. The rate of rainfall is based on a storm of one
hour duration and a 100 year return period.
19
TABLE L1108.3(1)
SIZE OF SCUPPERS
Length of Scupper, L (inches)
5" 6" 8" 10" 12" 18" 24" 30" 36"�
Head, H 4"
(inches) CAPACITY OF SCUPPER, Q(gallons per minute)
Q —3.33 x(L-0.2xH)xH1.5 A=QIi
Q= Flow rate through the scupper, gallons per minute (gpm)
Note: the minimum scupper height shall be 4". Scupper heights greater than 4"
do not change the values in the table.
(y) Combined Sanita and Storm Public Sewer. Section 1109 is hereby deleted in
its entirety.
(z) Medical gas certification. Section 1202 is hereby amended by adding a new
Section 1202.2, as follows:
1202.2 Certification required. A medical gas certification must be furnished to
the building inspection department before a final inspection will be approved.
§ 28.10.005 through § 28.10.050. (Reserved)
Division 2
Protection of Water Supply
§ 28.10.051 Definitions.
For the purposes of Section 28.10.052, Section 28.10.053 and Section 28.10.054 of the
Code of Ordinances of the City of Lubbock, and Section 312.9 and Section 608 of the
2021 International Plumbing Code, Sections P2503.7 and P2902 of the 2021
International Residential Code, and the USC Manual of Cross-Connection Control,
American Water Works Association M 14 Manual, the following definitions shall apply.
In the event of a conflict between the definitions set forth below and the definitions
provided in the 2021 International Plumbing, 2021 International Residential Codes, the
USC Manual of Cross-Connection Control, American Water Works Association M14
Manual, for the purposes of Sections 28.10.052, 28.10.053 and 28.10.054 of the Code
of Ordinances of the city, the definitions set forth below shall control.
20
(1) Air pap shall mean the unobstructed vertical distance through the free
atmosphere between the lowest opening from any pipe or faucet conveying
water to a tank, fixture, receptor, sink, or other assembly and the flood level rim
of the receptacle. The vertical, physical separation must be at least twice the
diameter of the water supply outlet, but never less than 1.0 inch. An air gap may
also be a horizontal space between two pipes at no less than 6.0 inches.
(2) Approved shall mean accepted by the authority responsible as meeting an
applicable specification stated or cited in Sections 28.10.051, 28.10.053 through
28.10.054 or as suitable for the proposed use.
(3) Auxiliary water supplv shall mean any water supply on or available to the
premises other than the purveyor's approved public water supply that presents a
potential contamination hazard of the public water system. These auxiliary
waters may include water from another purveyor's public water supply or any
natural source(s) such as a well, spring, river or stream or used waters, or
industrial fluids. These waters may be contaminated or polluted or they may be
objectionable and constitute an unacceptable water source over which the water
purveyor does not have sanitary control.
(4) Back ow shall mean the undesirable reversal of flow in a public water
distribution system as a result of a cross connection.
(5) Backflow prevention assemblx shall mean an approved assembly to counteract
backpressure or prevent backsiphonage.
(6) Backf�ow prevention assembl�y test and maintenance_ report shall mean the report
required for each backflow prevention assembly upon initial installation and
periodically thereafter as required, giving evidence that the backflow prevention
assembly has been properly selected based on the degree of hazard, and has been
properly installed and tested in accordance with applicable standards, and
showing the results of this test. The completed form will be forwarded to the
water purveyor for documentation and annual record keeping.
(�') Back ow prevention assembly tester, backflow tester, or general tester shall
mean a backflow assembly device tester who is qualified to test backflow
prevention assemblies on any domestic, commercial, industrial or irrigation
service (excepting firelines). This person must be licensed by TCEQ and
registered with the city.
(8) Backpressure shall mean pressure created by any means in the water distribution
system, which by being in excess of the pressure in the water supply mains
causes a potential backflow condition.
(9) Backsiphonage shall mean the backflow of potentially contaminated water into
the potable water system as a result of the pressure in the potable water system
21
falling below atmospheric pressure of the plumbing fixtures, pools, tanks or vats
connected to the potable water distribution piping.
(10) Building oificial shall mean the officer charged with the enforcement of the
building, plumbing, mechanical, electrical, fuel gas, and energy conservation
codes of the city, or his duly authorized representative. For purposes of Sections
28.10.051, 28.10.053 through 28.10.054, all state-licensed plumbing inspectors
under the supervision of the building official are his duly authorized
representatives.
(I 1) 13vpass arrangements shall mean any jumper connections, removable section,
unions, swivels or change-over devices and other temporary or permanent
devices through which or because of which backflow can occur.
(12) Contamination shall mean an impairment of the quality of the potable water that
creates an actual hazard to the public health through poisoning or through the
spread of discase by sewage, industrial fluids or waste.
(13) Cross connection shall mean a physical connection or bypass arrangement
between a public water system and either another supply of unknown or
questionable quality, or another source that may contain contaminating or
polluting substances, any source of water treated to a lesser degree in the
treatment process, or any steam, gas or chemical system.
(14) Cross-connection control device shall mean any nationally approved or
recognized device placed upon any connection, physical or otherwise, between a
potable water supply system and any plumbing fixture or any tank, receptacle,
equipment or device, which is designed to prevent nonpotable, used, unclean,
polluted and contaminated water, or other substance, from entering into any pari
of such potable water system under any condition or set of conditions.
(15) Cross connections - controlled shall mean a connection between a public water
system and a nonpublic water system with an approved backflow prevention
assembly properly installed and maintained so that it will continuously afford
the protection commensurate with the degree of hazard.
(16) Cross-connection control b containment shall mean the installation of an
approved backflow prevention assembly at the water service connection to any
customer's premises, where it is physically or economically unfeasible to find
and permanently eliminate or control all cross connections or potential
contamination hazards, within the customer's water system; or it shall mean the
installation of an approved backflow prevention assembly on the service line
leading to and supplying a portion of a customer's water system where there are
cross connections or potential contamination hazards, that cannot be effectively
eliminated or controlled at the point of the cross connection.
22
(17) Customerlpropertv owner shall mean the owner, as determined by the real
property records of Lubbock County, Texas, or the agent of the owner in
responsible charge of the subject premises. For purposes of Sections 28.10.051,
28.10.053 through 28.10.054, a licensed plumber and/or irrigator shall be
deemed to be an agent of the owner when performing work under the scope of
Sections 28.10.051, 28.10.053 through 28.10.054 pursuant to a plumbing andlor
irrigation permit.
(18) Customer service inspection shall mean an inspection designed to detect any
actual or potential point of contamination of the potable water system andlor
cross-connection hazards.
(19) Degree ofhazard shall mean the nonhealth hazard or health hazard classification
that shall be attached to all actual or potential cross connections.
(A) Nonhealth hazard shall mean a cross connection or potential cross
connection involving any substance that generally would not be a health
hazard but would constitute a nuisance or be aesthetically objectionable,
if introduced into a public water supply.
(B) Health hazard shall mean the classification assigned to a cross
connection or potential contamination hazard or other situation involving
any substance that can cause illness, death, spread of disease or has a
high probability of causing such effects if introduced into the potable
drinking water supply.
(20) Double check valve backftow assembly (DCVA), double check assembly, and
double check (DC) shall mean an assembly consisting of two independently
acting, approved check valves, including tightly closing resilient seated shutoff
valves attached at each end of the assembly and fitted properly located resilient
seated test cocks. This assembly shall only be used to protect against a nonhealth
hazard.
(21) Fireline tester shall mean a tester who is qualified to test backflow prevention
assemblies on firelines. This person must be licensed by TCEQ and registered
with the city.
(22) Licensed �rofessional shall mean any individual, or their representative, that
must maintain a license obtained through a professional licensing board in order
to conduct their business under state law.
(23) Nonpotable water shall mean water not safe for drinking, personal or culinary
utilization.
(24) Pollution shall mean an impairment of the quality of the potable water to a
degree that does not create a hazard to the public health but that does adversely
and unreasonably affect the aesthetic qualities of such potable water for
23
domestic use.
(25) Point of use isolation shall mean the appropriate backflow prevention within the
consumer's water system at the point at which the actual or potential cross
connection exists.
(26) Potable water shall mean water free from impurities present in amounts
sufficient to cause disease or harmful physiological effects and conforming to
the bacteriological and chemical quality requirements of the Public Health
Service Drinking Water Standards or the regulations of any public health
authority having jurisdiction over such matters.
(27) Potential contamination hazard shall mean a condition which, by its location,
piping or configuration, has a reasonable probability of being used incorrectly,
through carelessness, ignorance, or negligence, to create or cause to be created a
backflow condition by which contamination can be introduced into the public
water supply. Examples of potential contamination hazards are:
(A) Bypass arrangements;
(B) Jumper connections;
(C) Removable sections or spools; and
(D) Swivel or changeover assemblies.
(28) Public Health Service Drinkin Water Standards shall mean the standards set
forth in 30 TAC 290 subchapter F, as may be amended from time to time.
(29) Reduced ressure rinci le back ow revention assembl RPBA reduced
ressure rinci le assembl RPZ or RP assembl shall mean a backflow
prevention device consisting of two independently acting check valves,
internally force-loaded to a normally closed position and separated by an
intermediate chamber (or zone) in which there is an automatic relief ineans of
venting to the atmosphere, internally loaded to a normally open position
between two tightly closing shutoff valves and with a means for testing for
tightness of the checks and opening of the relief ineans.
(30) Repair o�an irrigation system shall mean the reconstruction or renewal of any
part of an existing irrigation system, including without limitation, installation of
a backflow prevention device, adding additional irrigation zones, reparation of a
main irrigation line and valve replacement. For the purpose hereof, the
replacement of a control box or sprinkler head(s) shall not be deemed to be a
repair.
(31) Service connection shall mean the point of delivery where the water purveyor
loses control over the water.
24
(32) Used water shall mean any water supplied by a water purveyor from a public
water system to a consumer's water system after it has passed through the point
of delivery or service connection and is no longer under the sanitary control of
the water purveyor.
(33) Water purvevor shall mean the director in charge of the water department of the
city, who is vested with the authority and responsibility for the implementation
of an effective cross-connection control program and for the enforcement of the
provisions of Sections 28.10.051, 28.10.053 through 28.10.054.
§ 28.10.052 Intent; conflicts.
Section 28.10.052, Section 28.10.053, and Section 28.10.054 of the Code of Ordinanccs
of the city are intended to supplement the USC Manual of Cross-Connection Control,
American Water Works Association M14 Manual, Section 312.9, "Inspection and
Testing of Backflow Prevention Assemblies," and Section 608, "Protection of Potable
Water Supply" of the 2021 International Plumbing Code, as well as Sections P2503.7
and P2902 of the 2021 International Residential Code, both codes having been
previously adopted as a part of the Code of Ordinances of the city. In the event of any
conflict between the USC Manual of Cross-Connection Control, American Water
Works Association M 14 Manual, Sections 312.9 or 608 of the 2021 International
Plumbing Code or Sections P2503.7 or P2902 of the 2021 International Residential
Code and Section 28.10.052, Section 28.10.053, and Section 28.10.054 of the Code of
Ordinances of the city, the provisions of Section 28.10.052, Section 28.10.053, and
Section 28.10.054 of the Code of Ordinances of the city shall control. Section
28.10.052, Section 28.10.053, and Section 28.10.054 of the Code of Ordinances of the
city shall be liberally construed to protect the public health and safety of the citizens of
the city.
§ 28.10.053 Responsibilities of water purveyor, user, customer/property owner and
backflow prevention assembly tester.
(a) Responsibilities of water purveyor.
(1)
(A) No water service connection to any premises shall be installed or
maintained by the water purveyor unless the water supply is
protected as required by state law, including without limitation,
30 TAC 290.44(h), 30 TAC 290.46(j), 30 TAC 290.47(i), 30
TAC 344.73 and 30 TAC 344.75, as same may be amended from
time to time. Service of water, subject to the provisions of
Sections 28.10.052, 28.10.053, or 28.10.054 of the Code of
Ordinances of the City of Lubbock, or Sections 312.9 or 608 of
the 2021 International Plumbing Code, or Sections P2503.7 or
P2902 of the 2021 International Residential Code, as applicable,
25
to any premises shall be discontinued by the water purveyor if a
backflow prevention assembly required by Sections 28.10.051,
28.10.053 through 28.10.054 is not installed properly, tested and
maintained, or if it is found that a backflow prevention assembly
has been removed, bypassed, or if an unprotected cross
connection exists on the premises. Service will not be restored
until such conditions or defects are corrected.
(B) For new facilities, permanent water service shall not be provided
until all testable backflow prevention assemblies have been tcsted
and are operational. Except in cases where the testing of
backflow prevention assemblies must be delayed until the
installation of internal production or auxiliary equipment, the city
shall not approve any certificate of occupancy until all backflow
prevention assemblies have been tested and are operational.
(2) Customer service inspection.
(A) A customer service inspection for cross-connection control shall
be completed by the city water purveyor prior to providing
continuous water service in each of the following circumstances:
(i) Water service to a newly constructed facility, in which
case the customer service inspection shall be performed in
conjunction with or near the same time as the plumbing
final inspection conducted by the building offcial.
(ii) Any correction, addition or improvement to the water
service or water distribution plumbing of any facility or
premises, except for minor repair and maintenance work
exempted from permitting by Section 106.2 of the 2021
International Plumbing Code, or in cases where an
approved RPBA backflow prevention device has bcen
installed at the point of water service connection such that
premises' isolation is achieved, and said device has becn
verified as having been properly tested and maintained as
provided herein. Where nonexempt plumbing work has
been performed upon the water service or water
distribution plumbing of any facility or premises, and
approved premises isolation has been provided as
described herein, the building official shall be solely
responsible for ensuring compliance of any such work on
the customer side of the backflow device.
(B) A permanent water service shall not be established with regard to
a newly constructed facility until after the customer service
26
inspection is completed.
(C) Temporary water service, for construction or other purposes, that
is found to pose a potential cross-connection threat to the potable
water due to the unknown use of the water therefor, or other
reasons or causes, shall be protected by an approved backflow
prevention assembly.
(3) If, in the judgment of the water purveyor or building official an approved
backflow prevention assembly is required at the customer's/property
owner's water service connection; or, within the customer's/property
owner's private water system for the safety of the public water system,
the water purveyor or the designated agent shall:
(A) Give notice in writing to the customer/property owner to install
an approved backflow prevention assembly(s) at specific
location(s) at hislher expense, and depending on the severity of
the threat to the public water supply, within the time frame
required by the city and in all instances within thirty (30) days.
(B) In the case of any premises where, in the opinion of the watcr
purveyor and/or building official, an imminent health threat is
posed due to cross connection or a potential contamination
hazard, water service to the facility may immediately be
discontinued without prior written notice to customer/property
owner. Although the city will attempt to provide notice as is
reasonably practical, no notice shall be required prior to
discontinuance.
(4) Failure, refusal or inability on the part of the customer/property owner to
install, have tested and maintain the backflow prevention assembly(s)
shall be grounds for discontinuing water service to the premises until
such requirements have been met as required by Sections 28.10.051,
28.10.053 through 28.10.054.
(5) Any reduction in water pressure caused by the installation of backflow
prevention assembly devices shall not be the responsibility of the city.
(b) Responsibilities of the customer/property owner. The customer'slproperty
owner's system shall include those parts of the potable water conveyance
facilities beyond the termination of the utility distribution system that are
conveying potable water to the points of use of customer/property owner.
(1) Backflow prevention assemblies shall be installed within the
customer's/property owner's system at the customer's/property owner's
expense at any time required by Sections 28.10.052, 28.10.053, or
27
28.10.054 of the Code of Ordinances of the city and/or Sections 312.9 or
608 of the 2021 International Plumbing Code, or Sections P2503.7 or
P2902 of the 2021 International Residential Code, or the USC Manual of
Cross-Connection Control, American Water Works Association M 14
Manual, as applicable. All backflow prevention devices must be installed
and tested as required by:
(A) Section 28.10.052, Section 28.10.053, and Section 28.10.054 of
the Code of Ordinances of the city;
(B) Section 312.9 and Section 608 of the 2021 International
Plumbing Code; and
(C) 30 TAC 290.44(h), 30 TAC 290.46(j) and 30 TAC 290.47(i).
(2) It shall be the responsibility of the customer/property owner to verify
that all applicable city plumbing and/or irrigation permits are obtained
and that the customer/property owner, or licensed plumber or irrigator, as
applicable, is in compliance with all of the provisions of those permits.
In addition to the remedies provided herein, in the event the backflow
prevention assembly is installed by a licensed professional, failure by
such licensed professional to follow the provisions of such permit will
result in written notice to the applicable state licensing agency, in
addition to being a violation of Sections 28.10.051, 28.10.053 through
28.10.054.
(3) It shall be the responsibility of the customer/property owner and
backflow prevention assembly tester performing the subject test(s) to
send to the city the backflow prevention assembly test and maintenance
records. These materials shall be delivered to the water purveyor office
of the city within ten (10) days of installation of the backflow prevention
assembly.
(4) The customer's/property owner's system shall be open for inspection at
all reasonable times to authorized representatives of the city to determine
whether cross connections or potential contamination hazards, including
violations of Sections 28.10.052, 28.10.053, or 28.10.054 of the Code of
Ordinances of the city andlor Sections 312.9 or 608 of the 2021
International Plumbing Code, or Sections P2503.7 or P2902 of the 2021
International Residential Code, as applicable, exist.
(5) If the customer or premises wherein potable water from the city is
supplied or provided has access to an auxiliary water supply that is
treated to a lesser degree than the public water supply or if the water
quality is unknown, and which is either cross connected or poscs a
potential contamination hazard to the public water system, the public
28
water system shall be protected against backflow or backsiphonagc by an
approved backflow prevention device or a horizontal air gap (physical
separation) as defined in Section 28.10.051(1). The described threat shall
be deemed a health hazard when determining the type of approved
backflow required. If the auxiliary water supply is used for irrigation
purposes, the backflow assembly shall be subject to the requirements of
state laws, as same may be amended from time to time.
(A) In order for a customer to install an auxiliary water supply on
property located within City of Lubbock's incorporated limits, the
auxiliary water supply must be registered with the city. The
registration shall be approved if the auxiliary water supply meets
all federal, state, and local requirements.
(B) If the customer does not install a backflow prevention device, the
following requirements must be met:
(i) The customer shall permit the city to perform a customer
service inspection to determine whether a horizontal air
gap exists between the two systems and no other potential
contamination hazards exist.
(ii) If a potential contamination hazard exists, the customer
shall install an approved backflow prevention device to
protect the public water system.
(iii) If a potential contamination hazard is not documented
during the customer service inspection, no backflow
prevention device shall be required. However, the city
shall require the customer, at the customer's expense, to
obtain a customer service inspection at a minimum of at
least every three years to confirm that the two separatc
systems have not been cross-connected and other
potential contamination hazards have not been created.
(C) Any customer who creates a cross-connection and does not
comply with the backflow protection ordinances in subsection (5)
shall be subject to receiving a citation and their city water servicc
being discontinued until a backflow protection device has been
installed at the premises.
(6) In the event industrial fluids, any material dangerous to health or any
other objectionable substances are handled in such a fashion as to crcatc
potential contamination hazard to the public water system, such
condition shall be deemed a health hazard. The public water system shall
be protected against backflow from the premises by installing an air gap,
29
a reduced pressure principle backflow assembly, or such other backflow
assembly device as may be required by 30 TAC 290.47(i), as same may
be amended from time to time. See attachment "A," to Ordinance 2007-
00056 incorporated herein and made a part hereof for all purposes.
(7) All new installations of or substantial alterations to fire suppression
systems that utilize the city's public water supply shall have installed a
U.L. approved backflow prevention device according to the degrec of
hazard that exists. For purposes of this section, a"substantial alteration"
is deemed to be any alteration or expansion of the system that would
trigger a requirement for review and approval by the authority having
jurisdiction, normally being the city fire marshal. All freline backflow
prevention assemblies must be installed inside the building as
determined by Section 28.10.053 of the Code of Ordinances of the city.
Upon the approved installation of the backilow prevention assembly, a
cross-connection test report completed by a licensed fireline tester must
be provided to the city as required by subsection (b)(3), above.
(8) Subject to the conditions of this subsection (b)(8), a reduced pressure
assembly shall be the minimum protection for fire hydrant water meters
which are being used for a temporary water supply during construction
or other uses which may pose a potential contamination hazard to the
public water supply. Only city fire hydrant water meters with approved
backflow prevention assemblies are allowed to be used within the city
limits. Failure to comply with this subsection (b)(8) will result in the fire
hydrant meter being removed from the premises by the water purveyor.
(9) It shall be the duty of the customer/property owner at any premises
where backflow prevention assemblies are installed to have certified
inspections and operational tests made upon installation and at least once
every three years in nonhealth hazard conditions. In those instances
where the water purveyor and/or building official of the city deems thc
potential backflow to be a health hazard or a potential health hazard,
certified inspections shall be required annually or at more frequent
intervals as deemed necessary by the water purveyor. All inspections and
tests of backflow prevention assemblies shall be at the expense of the
customer/property owner and shall be performed by a backflow tester
who is licensed with the Texas Commission on Environmental Quality
and registered with the water purveyor and meeting all conditions and
criteria of Section 28.10.052, Section 28.10.053, and Section 28.10.054
of the Code of Ordinances of the city.
(10) It shall be the responsibility of the customerlproperty owner that all
irrigation systems installed after the effective date hereof and for an
existing system in the event of a repair, shall have installed an approved
backflow prevention assembly other than an atmospheric vacuum
30
breaker (AVB), in the event an existing irrigation system is repaired.
(11) It shall be the responsibility of the customer/property owner to have the
backflow prevention assembly device tested as described in Sections
28.10.051, 28.10.053 through 28.10.054. The backflow prevention
assembly shall be repaired, overhauled, or replaced at the expense of the
customerlproperty owner whenever said assemblies are found to be
defective. Water service shall not be restored until repairs are complete.
(c) Responsibilities of the backflow prevention assembly tester. In addition to
requirements of the backflow prevention assembly tester set forth in other parts
of this division, the backflow prevention assembly tester shall also comply with
the following:
(1) The backflow prevention assembly tester shall perform competent tests,
issuing complete, accurate and legible reports of backflow prevention
assemblies tested, and filing backflow prevention assembly test and
maintenance reports as prescribed by division. Test reports shall be
submitted to the water purveyor office of the city, within (10) ten days of
the testing by the backflow prevention assembly tester of the installation,
replacement, or repair of the backflow assembly.
(2) Prior to performing any testing of backflow prevention assemblies within
the city, a licensed backflow prevention assembly tester must be
registered annually with the city in accordance with this section.
(A) Eligibility for registration shall be conditioned upon applicant
providing proof to the city that they are currently licensed as a
backflow prevention assembly tester by the Texas Commission
on Environmental Quality.
(B) Each applicant for registration shall furnish evidence to the city
to show that he/she has available the necessary tools and
equipment to properly test and certify such assemblies. Serial
numbers of all test gauges shall be registered with the city
annually and shall be listed on tests and maintenance reports prior
to being submitted to the city. Each recorded test kit shall be
tested annually for accuracy and calibrated to maintain a two-
percent accuracy factor.
(3) In the event the city has reason to believe that testing or reporting
deficiencies exist in a backflow prevention assembly tester's methods or
report, the city shall notify the tester and customer/property owner, and
shall take one or more of the following actions:
(A) Require the subject customer/property owner to have retested any
31
backflow prevention assembly previously reported as operational;
(B) In the event the backflow prevention assembly tester has
committed three (3) or more inadvertent testing or reporting
inaccuracies within a twelve-month period commencing with the
first inaccuracy, the backflow prevention assembly tester's
registration with the city may be suspended for a period of six (6)
months;
(C) In the event the backflow prevention assembly tester shall file
with the city an intentional or knowing falsified test report, the
backflow prevention assembly tester's registration with the city
shall be revoked by the city.
§ 28.10.054 Approved backflow prevention device assembly and installation.
(a) Any backflow prevention assembly required by Sections 28.10.052, 28.10.053,
or 28.10.054 of the Code of Ordinances of the city, or Section 312.9 or 608 of
the 2021 International Plumbing Code, or Sections P2503.7 or P2902 of the
2021 International Residential Code, or the USC Manual of Cross-Connection
Control, American Water Works Association M 14 Manual, as applicable, shall
be of a model and size approved by the water purveyor/building official or as
approved by 30 TAC 290.47(i), as same may be amended from time to time.
Backflow prevention devices must be approved by the city prior to installation.
A plumbing permit is required in accordance with Section 28.05.001 of this
chapter. The city shall determine the type and location of the backflow
prevention assembly to be installed within the area served by the public water
system.
(b) 1'he term "approved backflow prevention assembly" shall mean a backflow
prevention assembly that has been manufactured and installed in full
conformance with the standards specified within the 2021 International
Plumbing Code and those established by the American Water Works
Association (AWWA) and thc USC Manual of Cross-Connection Control,
American Water Works Association M14 Manual, titled:
AWWA C510 Standard for pouble Check Valve Backflow-Prevention
Assembly, and AWWA C511 Standard for Reduced-Pressure Backflow-
Prevention Assembly, and have met completely the laboratory field performance
specifications of the Foundation for Cross-Connection Control and Hydraulic
Research (FCCHR) and the University of Southern California (USC),
"Specification of Backflow-Prevention Assemblies" - Sec. 10 of the most current
issue of the Manual of Cross-Connection Control.
(c) Backflow prevention assemblies shall be installed in a manner designed to
facilitate ease of testing and inspection by the city or any certified general tcstcr.
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All backflow prevention assemblies shall be tested upon installation, relocation,
or repair of same.
(d) Backflow prevention assemblies, in addition to other requirements set forth in
Sections 28.10.052, 28.10.053, or 28.10.054 of the Code of Ordinances of the
city, or Section 312.9 or 608 of the 2021 International Plumbing Code, Sections
P2503.7 or P2902 of the 2021 International Residential Code, or the USC
Manual of Cross-Connection Control, American Water Works Association M 14
Manual, shall be installed in accordance with subsections (1) through (9) below.
The clearance standards set forth in subsections (1) through (9), below, shall
apply to all assemblies installed in enclosures and meter boxes.
(1) Backflow prevention assemblies that are larger than four inches and
installed more than five feet above floor level must have a suitablc
platform for use by testing or maintenance personnel.
(2) All backflow prevention assemblies installed eight feet or higher above
floor level must have installed a suitable permanent ladder for use by
testing or maintenance personnel.
(3) All backflow prevention assembly enclosures shall be designed for ready
access and sized to allow for the minimum clearance as established in
this article. Removable protective enclosures may be installed on smaller
assemblies.
(4) Reduced pressure zone assemblies two inches and smaller shall have at
least a six-inch clearance on both ends and on top of the assembly.
Additionally, there shall be twelve inches of clearance below the relief
valve and twelve inches of clearance on the test cock side of the
assembly. All assemblies larger than two inches shall have a minimum of
twelve inches of clearance on the back side, twenty-four inches of
clearance on the test cock side, and the relief valve opening shall be at
least twelve inches plus nominal size of assembly above the floor or
highest possible water level.
(5) Double check valve assemblies larger than two inches may be installed
above finished grade in a freeze-proof enclosure or below grade in a
vault. If assembly is installed below grade, the test cocks must be
plugged with corrosion resistant watertight plugs, and shall be no less
than twelve inches below grade with a minimum of twelve inches
clearance below the backflow assembly device. There shall be at lcast a
six-inch clearance on both ends of the assembly with a minimum
clearance of twelve inches on the back side and twenty-four inches on
the test cock side. The top of the vault shall be two inchcs above ground
level. Double check valve assemblies shall be installed so that the checks
are horizontal.
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(6) Double check valve assemblies two inches and smaller may be installed
above fnished grade in a freeze-proof enclosure or below grade in a box.
If assembly is installed below grade, the test cocks must be plugged with
corrosion resistant watertight plugs, and shall be no less than twelve
inches below grade with a minimum of twelve inches clearance below
the backflow assembly device. There shall be at least a six-inch
clearance on both ends of the assembly with a minimum clearance of
twelve inches on the back side and twelve inches on the test cock sidc.
The top of the box shall be two inches above ground level. Double check
valve assemblies shall be installed so that the checks are horizontal.
(7) Bypass arrangements are prohibited. Pipe fittings which could
reasonably be calculated to constitute a means by which a backflow
assembly could be bypassed and defeated shall not be installed.
(8) All facilities that require continuous, uninterrupted water service and are
required to have a backflow assembly must make provision for the
parallel installation of assemblies of the same type so that testing, repair
and maintenance can be performed.
(9) All health hazard facilities shall have containment from the city's potable
water system. For the purposes of this subsection, "containment" shall
mean protection of the public water supply at the service connection.
§ 28.10.055 Appeals.
The mechanism for appeal from the provisions of this division, or from a decision of an
administrative official enforcing same, shall be through the building board of appeals of
the city in the same manner as set forth in Section 2.03.501 of this code. It is further
provided that said board shall have no authority to waive, set aside or alter any
provision of this division otherwise mandated by the laws of the state.
§ 28.10.056 Violations.
Violation of any provision of this division shall be deemed a misdemeanor punishable
as provided in Section 1.01.004 of the Code of Ordinances of the city. Additionally, a
violation of any provision of this division shall be deemed to be a nuisance as defincd
under Section 34.02.031 of the Code of Ordinances of the city. Notwithstanding the
above, in the event a violation results in an imminent risk to human health, safety or
welfare, the city may immediately discontinue water service to the subject facility
without notice. Notwithstanding the right to immediately discontinue water service
without notice, as described herein, the city will attempt to provide notice as is
reasonably practical under the circumstances presented. The city will provide customer
with necessary information to properly reinstate service.
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SECTION 2. THAT violation of any provision of this ordinance shall be deemed a misdemeanor
punishable as provided by Section 1.01.004 of the Code of Ordinances of the City of Lubbock,
Texas.
SECTION 3. THAT should any paragraph, sentence, clause, phrase or word of this Ordinance
be declared unconstitutional or invalid for any reason, the remainder of this Ordinance shall not
be affected thereby.
SECTION 4. THAT pursuant to Section 214.218 of the Texas Local Government Code, this
Ordinance shall not be implemented or enforced until after the 30th day after the date of final
adoption.
SECTION 5. THAT the City Secretary of the City of Lubbock, Texas, is hereby authorized and
directed to cause publication of the descriptive caption of this Ordinance as an alternative means
of publication provided by law.
AND IT IS SO ORDERED.
Passed by the City Council on first reading on _ March 5, 2024
Passed by the City Council on second reading on ___ March 26, 2024 __
ATTEST:
Courtney Paz, City Secreta ^
APPROVED AS TO CONTENT:
obert Wallace, Director of Development Services
APPROVED AS TO FORM:
A S' s, Dep ity Attorney
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