Minimum fixture counts, accessibility, and special fixtures/specialties

Grounded in the retrieved California Plumbing Code — click a citation to read the verbatim passage:

• CPC § 403.3 Medium relevance — show source text

  403.3 Exposed Pipes and Surfaces . . . . .60

  404.0 Waste Fittings and Overflows . . . . .60

  404.1 Waste Fittings . . . . . . . . . . . . . . . . .60

  404.2 Overflows . . . . . . . . . . . . . . . . . . . .60

  405.0 Prohibited Fixtures . . . . . . . . . . . . .60

  405.1 Prohibited Water Closets . . . . . . . .60

  405.2 Prohibited Urinals . . . . . . . . . . . . . .60

  405.3 Miscellaneous Fixtures . . . . . . . . . .60

  406.0 Special Fixtures and Specialties . . .61

  406.1 Water and Waste Connections . . . .61

  406.2 Special Use Sinks . . . . . . . . . . . . .61

  406.3 Special Use Fixtures . . . . . . . . . . .61

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  TABLE OF CONTENTS

  406.4 Zinc Alloy Components . . . . . . . . .61

  407.0 Lavatories . . . . . . . . . . . . . . . . . . . .61

  407.1 Application . . . . . . . . . . . . . . . . . . .61

  407.2 Water Consumption . . . . . . . . . . . .61

  407.3 Limitation of Hot Water

  Temperature for Public Lavatories . . . . . . . . . . . . . . . . . . . .61

  407.4 Transient Public Lavatories . . . . . .61

  407.5 Waste Outlet . . . . . . . . . . . . . . . . . .61

  407.6 Overflow . . . . . . . . . . . . . . . . . . . . .61

  408.0 Showers . . . . . . . . . . . . . . . . . . . . .61

  408.1 Application . . . . . . . . . . . . . . . . . . .61

  408.2 Tileable Shower Receptors . . . . . .61

  408.3 Water Consumption . . . . . . . . . . . .61

  408.4 Individual Shower and

  Tub-Shower Combination

  Control Valves . . . . . . . . . . . . . . . .62

  408.5 Waste Outlet . . . . . . . . . . . . . . . . . .62

  408.6 Finished Curb or Threshold . . . . . .62

  408.7 Shower Compartments . . . . . . . . . .62

  408.8 Lining for Showers and Receptors . . . . . . . . . . . . . . . . . . . .62

  408.9 Public Shower Floors . . . . . . . . . . .63

  408.10 Location of Valves and Heads . . . . .63

  408.11 Water Supply Riser . . . . . . . . . . . .63

  409.0 Bathtubs and Whirlpool Bathtubs . . . . . . . . . . . . . . . . . . . . .63

• CPC § 401.2 Medium relevance — show source text

  401.2 Quality of Fixtures . . . . . . . . . . . . .59

  401.3 Water-Conserving Fixtures and Fittings . . . . . . . . . . . . . . . . . . .59

  402.0 Installation . . . . . . . . . . . . . . . . . . .59

  402.1 Cleaning . . . . . . . . . . . . . . . . . . . . .59

  402.2 Joints . . . . . . . . . . . . . . . . . . . . . . .59

  402.3 Securing Fixtures . . . . . . . . . . . . . .59

  402.4 Wall-Hung Fixtures . . . . . . . . . . . . .59

  402.5 Setting . . . . . . . . . . . . . . . . . . . . . .59

  402.6 Flanged Fixture Connections . . . . .59

  402.7 Supply Fittings . . . . . . . . . . . . . . . .60

  402.8 Installation . . . . . . . . . . . . . . . . . . .60

  402.9 Design and Installation of Plumbing Fixtures . . . . . . . . . . . . . .60

  402.10 Slip Joint Connections . . . . . . . . . .60

  402.11 Future Fixtures . . . . . . . . . . . . . . . .60

  403.0 Accessible Plumbing Facilities . . . .60

  403.1 General . . . . . . . . . . . . . . . . . . . . . .60

  403.2 Fixtures and Fixture Fittings for Persons with Disabilities . . . . . .60

  403.3 Exposed Pipes and Surfaces . . . . .60

  404.0 Waste Fittings and Overflows . . . . .60

  404.1 Waste Fittings . . . . . . . . . . . . . . . . .60

  404.2 Overflows . . . . . . . . . . . . . . . . . . . .60

  405.0 Prohibited Fixtures . . . . . . . . . . . . .60

  405.1 Prohibited Water Closets . . . . . . . .60

  405.2 Prohibited Urinals . . . . . . . . . . . . . .60

  405.3 Miscellaneous Fixtures . . . . . . . . . .60

  406.0 Special Fixtures and Specialties . . .61

  406.1 Water and Waste Connections . . . .61

  406.2 Special Use Sinks . . . . . . . . . . . . .61

  406.3 Special Use Fixtures . . . . . . . . . . .61

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  TABLE OF CONTENTS

  406.4 Zinc Alloy Components . . . . . . . . .61

  407.0 Lavatories . . . . . . . . . . . . . . . . . . . .61

  407.1 Application . . . . . . . . . . . . . . . . . . .61

  407.2 Water Consumption . . . . . . . . . . . .61

  407.3 Limitation of Hot Water

• California Plumbing Code Medium relevance — show source text

  000
  149 000
  132 000| |60
  70
  80
  90
  100|892
  821
  764
  717
  677|1870
  1720
  1600
  1500
  1420|3520
  3230
  3010
  2820
  2670|7220
  6640
  6180
  5800
  5470|10 800
  9950
  9260
  8680
  8200|20 800
  19 200
  17 800
  16 700
  15 800|33 200
  30 500
  28 400
  26 700
  25 200|58 700
  54 000
  50 200
  47 100
  44 500|120 000
  110 000
  102 000
  96 100
  90 800| |125
  150
  175
  200
  250|600
  544
  500
  465
  412|1250
  1140
  1050
  973
  862|2360
  2140
  1970
  1830
  1620|4850
  4400
  4040
  3760
  3330|7270
  6590
  6060
  5640
  5000|14 000
  12 700
  11 700
  10 900
  9620|22 300
  20 200
  18 600
  17 300
  15 300|39 500
  35 700
  32 900
  30 600
  27 100|80 500
  72 900
  67 100
  62 400
  55 300| |300
  350
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  500|374
  344
  320
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  283|781
  719
  669
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  593|1470
  1350
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  1120|3020
  2780
  2590
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  2290|4530
  4170
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  3430|8720
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  22 600
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  257
  246
  236
  228|563
  537
  514
  494
  476|1060
  1010
  969
  931
  897|2180
  2080
  1990
  1910
  1840|3260
  3110
  2980
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  2760|6280
  5990
  5740
  5510
  5310|10 000
  9550
  9150
  8790
  8470|17 700
  16 900
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  15 000|36 100
  34 400
  33 000
  31 700
  30

• California Plumbing Code Medium relevance — show source text

  000| |125
  150
  175
  200
  250|848
  768
  706
  657
  582|1770
  1610
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  1220|3340
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  2590
  2290|6850
  6210
  5710
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  4710|10 300
  9300
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  7060|19 800
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  13 600|31 500
  28 600
  26 300
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  21 700|55 700
  50 500
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  38 300|114 000
  103 000
  94 700
  88 100
  78 100| |300
  350
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  500|528
  486
  452
  424
  400|1100
  1020
  945
  886
  837|2080
  1910
  1780
  1670
  1580|4270
  3930
  3650
  3430
  3240|6400
  5880
  5470
  5140
  4850|12 300
  11 300
  10 500
  9890
  9340|19 600
  18 100
  16 800
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  14 900|34 700
  31 900
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  27 900
  26 300|70 800
  65 100
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  56 800
  53 700| |550
  600
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  750|380
  363
  347
  334
  321|795
  759
  726
  698
  672|1500
  1430
  1370
  1310
  1270|3070
  2930
  2810
  2700
  2600|4610
  4400
  4210
  4040
  3900|8870
  8460
  8110
  7790
  7500|14 100
  13 500
  12 900
  12 400
  12 000|25 000
  23 900
  22 800
  21 900
  21 100|51 000
  48 600
  46 600
  44 800
  43 100| |800
  850
  900
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  1000|310
  300
  291
  283
  275|649
  628
  609
  592
  575|1220
  1180
  1150
  1110
  1080|2510
  2430
  2360
  2290
  2230|3760
  3640
  3530
  3430
  3330|7240
  7010
  6800
  6600
  6420|11 500
  11 200
  10 800
  10 500
  10 200|20 400
  19 800
  19 200
  18 600
  18 100|41 600
  40 300
  39 100
  37 900
  36

• CPC § 8.5 Medium relevance — show source text

  The white-shaded cells accept input from the designer. For instance, fixture counts from the given information are entered in Column [B]; the corresponding recommended fixture flow rates are already provided in Column [D]. The flow rates in Column [D] may be reduced only if the manufacturer specifies a lower flow rate for the fixture. Column [E] establishes the upper limits for the flow rates entered into Column

  [D]. Clicking the Run Water Demand Calculator button gives 8.5 gpm (0.54 L/s) as the estimated indoor water demand for the whole building. This result appears in the dark gray box FIGURE 1 of the WDC in Figure 2. RESIDENTIAL BUILDING WITH SIX INDOOR FIXTURES

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  APPENDIX M

  [A] FIXTURE	Col2	[B] ENTER NUMBER OF FIXTURES	[C] PROBABILITY OF USE (%)	[D] ENTER FIXTURE FLOW RATE (GPM)	[E] MAXIMUM RECOMMENDED FIX- TURE FLOW RATE (GPM)
  1	Bar Sink	0	2.0	1.5	1.5
  2	Bathtub	0	1.0	5.5	5.5
  3	Bidet	0	1.0	2.0	2.0
  4	Clothes Washer	1	5.5	3.5	3.5
  5	Combination Bath/Shower	1	5.5	5.5	5.5
  6	Dishwasher	1	0.5	1.3	1.3
  7	Kitchen Faucet	1	2.0	2.2	2.2
  8	Laundry Faucet	0	2.0	2.0	2.0
  9	Lavatory Faucet	1	2.0	1.5	1.5
  10	Shower, per head	0	4.5	2.0	2.0
  11	Water Closet, 1.28 GPF Gravity Tank	1	1.0	3.0	3.0
  12	Other Fixture 1	0	0.0	0.0	6.0
  13	Other Fixture 2	0	0.0	0.0	6.0
  14	Other Fixture 3	0	0.0	0.0	6.0
  Total Number of Fixtures	Total Number of Fixtures	6		RESET	RUN WATER DEMAND CALCULATOR
  99th Percentile Demand Flow =	99th Percentile Demand Flow =	8.5 GPM

  For SI units: 1 gallon per minute = 0.66 L/s, 1 gallon = 3.785 L

  FIGURE 2 WATER DEMAND CALCULATOR FOR INDOOR USE AT HOME WITH SIX EFFICIENT FIXTURES (EXAMPLE 1)

  Solution: Step 2 of 2 – Determine the Pipe Size of the Building Supply.

• CPC § 422.1 Medium relevance — show source text

  add 1 fixture for
  each additional 500 males
  and 1 fixture for each 200
  females.|Over 400, add 1 fixture for
  each additional 500 males
  and 1 fixture for each 200
  females.|Over 400,
  add 1 fixture
  for each
  additional
  500 males.|Over 400, add 1 fixture for
  each additional 500 males
  and 1 fixture for each 400
  females.|Over 400, add 1 fixture for
  each additional 500 males
  and 1 fixture for each 400
  females.|––|Over 750,
  add 1 fixture
  for each
  additional
  500 persons.|––|

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  PLUMBING FIXTURES AND FIXTURE FITTINGS

  TABLE 422.1

  Col1	Col2	MINIMUM	Col4	PLUMBING F	FACILITIES1 (continued)	Col7	Col8	Col9	Col10
  TYPE OF OCCUPANCY2	TYPE OF OCCUPANCY2	WATER CLOSETS (FIXTURES PER PERSON)3	WATER CLOSETS (FIXTURES PER PERSON)3	URINALS (FIXTURES PER PERSON)4	LAVATORIES (FIXTURES PER PERSON)5	LAVATORIES (FIXTURES PER PERSON)5	BATHTUBS OR SHOWERS (FIXTURES PER PERSON)	DRINKING FOUNTAINS/ FACILITIES (FIXTURES PER PERSON)	OTHER6, 7
  R-1 Residential occu- pancy (minimal stay)- hotels, motels, bed and breakfast homes	R-1 Residential occu- pancy (minimal stay)- hotels, motels,

• CPC § 422.1.1 Medium relevance — show source text

  422.1.1 Fixture Calculations. The minimum number of fixtures shall be calculated at 50 percent male and 50 percent female based on the total occupant load. Where information submitted indicates a difference in the distribution

  of the sexes such information shall be used to determine the number of fixtures for each sex. Once the occupancy load and occupancy are determined, Table 422.1 shall be applied to determine the minimum number of plumbing fixtures required. Where applying the fixture ratios in Table 422.1 results in fractional numbers, such numbers shall be rounded to the next whole number. For multiple occupancies, fractional numbers shall be first summed and then rounded to the next whole number. For toilet facilities designed for use by all genders, the minimum number of fixtures shall be the aggregate calculated at 50 percent female and 50 percent male in accordance with Table 422.1. Where all-gender fixtures are provided in addition to separate men’s and women’s facilities, those fixtures shall be included in determining the number of fixtures provided in an occupancy. [BSC & DSA-SS] The substitution of a water closet for each urinal shall be permitted provided the total number of fixtures installed complies with Table 422.1. 422.1.2 Single Use, Family or Assisted-Use Toilet, and Bathing Facilities. Where single use, family or assisted-use toilet, and bathing rooms are required, in applicable building regulations, the facilities shall be installed in accordance with those regulations. Fixtures located in single use, family or assisted-use, and bathing room facilities shall contribute to the total number of required fixtures in accordance with Section 422.1.

  422.1.3 [DSA-AC] Effective January 1, 1990, in new construction and those existing facilities which occu- pancy type are listed in Tables 422.1 and 4-4 for public use, which apply for permit to undertake construction, structural alterations, repairs or improvement which exceed 50 percent of the square footage of the entire facility, shall install water closets, urinals, lavatories and drinking fountains as stipulated in Tables 422.1 and 4-4 for public use. Community and/or municipal parks with a bleacher capacity not exceeding 500 seats shall be exempt from the requirements of this section and Tables 422.1 and 4-4. Each bathroom shall comply with Part 2, Chapter 11A and 11B of the California Building Code.

  422.1.4 [OSHPD 1, 2, 3, 4 & 5] OSHPD facilities shall also comply with requirements of the California Building Code, Sections 1224, 1225, 1226, 1227 and 1228.

  422.2 Separate Facilities. Separate toilet facilities shall be provided for each sex.

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• California Plumbing Code Medium relevance — show source text

  | |11⁄2|11⁄4
  |78|78|78|78|66|52|44|39|33|29|24|20|19|17|16| |1
  |11⁄2
  |85|85|85|85|85|85|80|67|55|49|41|37|34|32|30| |11⁄2|11⁄2
  |151|151|151|151|128|105|90|78|62|52|42|38|35|32|30| |2|11⁄2|151|151|151|151|150|117|98|84|67|55|42|38|35|32|30| |1
  |2|85|85|85|85|85|85|85|85|85|85|85|85|85|83|80| |11⁄2|2|370|370|340|318|272|240|220|198|170|150|135|123|110|102|94| |2|2
  |370|370|370|370|368|318|280|250|205|165|142|123|110|102|94| |2|21⁄2|654|640|610|580|535|500|470|440|400|365|335|315|285|267|250| |PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1|PRESSURE RANGE – Over 60 psi1| |3⁄4
  |1⁄22
  |7|7|7|6|5|4|3|3|2|1|1|1|1|1|0| |3⁄4
  |3

• CPC § 0.0 Medium relevance — show source text

  0|0.0|6.0| |14|Other Fixture 3|0|0.0|0.0|6.0| |Total Number of Fixtures|Total Number of Fixtures|6||RESET|RUN WATER DEMAND
  CALCULATOR| |99th Percentile Demand Flow =|99th Percentile Demand Flow =|8.5 GPM||||

  For SI units: 1 gallon per minute = 0.66 L/s, 1 gallon = 3.785 L

  M 102.8 Examples Illustrating Use of Water Demand Calculator with Appendix A.

  Example 1: Indoor Water Use Only – Use the information given below to find the pipe size for the building supply to a residential building with six indoor fixtures as shown in Figure 1 [Pipe Section 4].

  Given Information:	Col2	Col3	Col4
  Type of construction:	Residential, one-bathroom	Friction loss per 100 ft (30 480 mm):	15 psi (103 kPa)
  Type of pipe material:	L-copper	Maximum velocity:	10 ft/s (3.05 m/s)
  Fixture number/type:	1 combination bath/shower 1 kitchen faucet 1 lavatory faucet 1 dishwasher 1 WC 1 clothes washer	1 combination bath/shower 1 kitchen faucet 1 lavatory faucet 1 dishwasher 1 WC 1 clothes washer	1 combination bath/shower 1 kitchen faucet 1 lavatory faucet 1 dishwasher 1 WC 1 clothes washer

  Solution: Step 1 of 2 – Find Demand Load for the Build- ing Supply.

  The Water Demand Calculator [WDC] in Figure 2 is used to determine the demand load expected from indoor water use. The WDC has white-shaded cells and light gray-shaded cells. The values in the light gray cells are derived from a national survey of indoor water use at homes with efficient fixtures and cannot be changed.

  The white-shaded cells accept input from the designer. For instance, fixture counts from the given information are entered in Column [B]; the corresponding recommended fixture flow rates are already provided in Column [D]. The flow rates in Column [D] may be reduced only if the manufacturer specifies a lower flow rate for the fixture. Column [E] establishes the upper limits for the flow rates entered into Column

  [D]. Clicking the Run Water Demand Calculator button gives 8.5 gpm (0.54 L/s) as the estimated indoor water demand for the whole building. This result appears in the dark gray box FIGURE 1 of the WDC in Figure 2. RESIDENTIAL BUILDING WITH SIX INDOOR FIXTURES

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  APPENDIX M

  [A] FIXTURE	Col2	[B] ENTER NUMBER OF FIXTURES	[C] PROBABILITY OF USE (%)	[D] ENTER FIXTURE FLOW RATE (GPM)	[E] MAXIMUM RECOMMENDED FIX- TURE FLOW RATE (GPM)
  1	Bar Sink	0	2.0	1.5	1.5
  2	Bathtub	0	1.0	5.5	5.

• CPC § 18.9 Medium relevance — show source text

  Protectors, insulators, or both shall comply with ASME A112.18.9 or ASTM C1822. [HCD 1-AC] Specific requirements regard- ing accommodations for persons with disabilities are contained in Chapter 11A of the California Building Code.

  404.0 Waste Fittings and Overflows. 404.1 Waste Fittings. Waste fittings shall comply with ASME A112.18.2/CSA B125.2, ASTM F409 or Table 701.2 for aboveground drainage piping and fittings. 404.2 Overflows. Where a fixture is provided with an overflow, the overflow shall comply with Section 404.2.1 or Section 404.2.2.

  404.2.1 Sinks, Lavatories, and Bathtubs. The waste shall be so arranged that the standing water in the fixture shall not rise in the overflow where the stopper is closed or remain in the overflow where the fixture is empty. The overflow pipe from a fixture shall be connected to the house or inlet side of the fixture trap.

  404.2.2 Water Closets and Urinals. Overflows on flush tanks shall be permitted to discharge into the water closets or urinals served by them.

  405.0 Prohibited Fixtures.

  405.1 Prohibited Water Closets. Water closets having an invisible seal or an unventilated space or having walls which are not thoroughly washed at each discharge shall be prohibited. A water closet that might permit siphonage of the contents of the bowl back into the tank shall be prohibited. 405.2 Prohibited Urinals. Trough urinals and urinals with an invisible seal shall be prohibited.

  405.3 Miscellaneous Fixtures. Fixed wooden, or tile wash sinks for domestic use shall not be installed in a building designed or used for human habitation. No sheet metal-lined wooden bathtub shall be installed or reconnected. No dry or chemical closet (toilet) shall be installed in a building used for human habitation unless first approved by the Health Officer.

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  406.0 Special Fixtures and Specialties.

  406.1 Water and Waste Connections. Baptisteries, ornamental and lily ponds, aquaria, ornamental fountain basins, and similar fixtures and specialties requiring water, waste connections, or both shall be submitted for approval to the Authority Having Jurisdiction prior to installation.

  406.2 Special Use Sinks. Restaurant kitchen and other special use sinks shall be permitted to be made of approvedtype bonderized and galvanized sheet steel of not less than No. 16 U.S. gauge (0.0635 inches) (1.6 mm). Sheet-metal plumbing fixtures shall be adequately designed, constructed, and braced in an approved manner to accomplish their intended purpose.

  406.3 Special Use Fixtures. Special use fixtures shall be made of one of the following:

  (1) Soapstone

  (2) Chemical stoneware

  (3) Copper-based alloy

  (4) Nickel-based alloy

  (5) Corrosion-resistant steel

  (6) Other materials suited for the intended use of the fixture

  406.4 Zinc Alloy Components. Zinc alloy components shall comply with applicable nationally recognized standards and shall be used in accordance with their listing.

• CPC § 420.4 Medium relevance — show source text

  420.4 Waste Outlet. Kitchen and laundry sinks shall have a waste outlet and fixture tailpiece not less than 1 [1] ⁄ 2 inches (40 mm) in diameter. Service sinks shall have a waste outlet and fixture tailpiece not less than 2 inches (50 mm) in diameter. Fixture tailpieces shall be constructed from the materials specified in Section 701.2 for drainage piping. Waste outlets shall be provided with an approved strainer.

  421.0 Floor Sinks.

  421.1 Application. Floor sinks shall comply with ASME A112.6.7.

  421.2 Strainers. The waste outlet of a floor sink shall be provided with an approved strainer or grate that is removable and accessible.

  422.0 Minimum Number of Required Fixtures. 422.1 Fixture Count. Plumbing fixtures shall be provided for the type of building occupancy and in the minimum number shown in Table 422.1. The total occupant load and occu

  TABLE 420.3

  COMMERCIAL PRE-RINSE SPRAY VALVE MAXIMUM FLOW RATE

  For SI units: 1 gallon per minute = 3.785 L/min, 1 ounce-force = 0.278 N

  <

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  PLUMBING FIXTURES AND FIXTURE FITTINGS

  Exceptions [Not adopted for OSHPD 1, 2, 3, 4 & 5] : (1) Residential installations. (2) In occupancies with a total occupant load of 10 or less, including customers and employees, one toilet facility, designed for use by no more than one person at a time, shall be permitted for use by both sexes. (3) In business and mercantile occupancies with a total occupant load of 50 or less including customers and employees, one toilet facility, designed for use by no more than one person at a time, shall be permitted for use by both sexes. (4) Separate facilities shall not be required where rooms have fixtures designed for use by both sexes and the water closets are installed in privacy compartments. Urinals shall be located in a privacy compartment [BSC & DSA-SS] , as defined, or separate private area and be visually separated from the remainder of the room. Water closet and urinal compartments shall comply with sections 422.6 and 422.7 respectively. 422.2.1 Single Use Facilities. Single use toilet facilities, bathing facilities, and family or assisted use toilet facilities shall be identified with signage indicating use by either sex. 422.2.2 Family or Assisted-Use Toilet Facilities. Where a separate toilet facility is required for each sex, and each toilet facility is required to have only one water closet, two family or assisted-use toilet facilities shall be permitted in place of the required separate toilet facilities. 422.3 Fixture Requirements for Special Occupancies. Additional fixtures shall be permitted to be required where unusual environmental conditions or referenced activities are encountered. In food preparation areas, fixture requirements shall be permitted to be dictated by health codes. 422.3.1 [OSHPD 1, 2, 3, 4, 5 & 6] Separate toilet facil- ities shall be provided for the use of patients, staff per- sonnel and visitors.

• CPC § 1.0 Medium relevance — show source text

  0| |Nonwater Urinal with Drain Cleansing Action|1⁄2|1.0|1.0|1.0| |Wash Fountain, circular spray|3⁄4|––|4.0|––| |Water Closet, 1.6 GPF Gravity Tank|1⁄2|2.5|2.5|3.5| |Water Closet, 1.6 GPF Flushometer Tank|1⁄2|2.5|2.5|3.5| |Water Closet, 1.6 GPF Flushometer Valve|1|See Footnote7|See Footnote7|––| |Water Closet, greater than 1.6 GPF Gravity Tank|1⁄2|3.0|5.5|7.0| |Water Closet, greater than 1.6 GPF Flushometer Valve|1|See Footnote7|See Footnote7|––|

  For SI units: 1 inch = 25 mm

  Notes: 1 Size of the cold branch pipe, or both the hot and cold branch pipes. 2 Appliances, appurtenances, or fixtures not referenced in this table shall be permitted to be sized by reference to fixtures having a similar flow rate and frequency of use. 3 The listed fixture unit values represent their load on the cold water building supply. The separate cold water and hot water fixture unit value for fixtures having both hot and cold water connections shall be permitted to be each taken as three-quarter of the listed total value of the fixture. 4 The listed minimum supply branch pipe sizes for individual fixtures are the nominal (I.D.) pipe size. 5 For fixtures or supply connections likely to impose continuous flow demands, determine the required flow in gallons per minute (gpm) (L/s), and add it separately to the demand in gpm (L/s) for the distribution system or portions thereof. 6 Assembly [Public Use (See Table 422.1)]. 7 Where sizing flushometer systems, see Section 610.10. 8 Reduced fixture unit loading for additional hose bibbs is to be used where sizing total building demand and for pipe sizing where more than one hose bibb is supplied by a segment of water distribution pipe. The fixture branch to each hose bibb shall be sized on the basis of 2.5 fixture units. 9 For water supply fixture unit values related to lots within mobilehome parks in all parts of the State of California, see California Code of Regulations, Title 25, Division 1, Chapter 2, Article 5, Section 1278. For water supply fixture unit values related to lots within special occupancy parks in all parts of the State of California, see California Code of Regulations, Title 25, Division 1, Chapter 2.2, Article 5, Section 2278.

  158 2025 CALIFORNIA PLUMBING CODE

  ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

  WATER SUPPLY AND DISTRIBUTION

  Col1	Col2	TABLE 610.4 FIXTURE UNIT TABLE FOR DETERMINING WATER PIPE AND METER SIZES	Col4	Col5	Col6	Col7	Col8	Col9	Col10	Col11	Col12	Col13	Col14	Col15	Col16	Col17
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