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Chapter 8 Compliance Forms, Worksheets and Reference Material

AMENDMENT
This section has been amended at the state or city level.
WORKSHEET (WS-1)
BASELINE WATER USE
BASELINE WATER USE CALCULATION TABLE
FIXTURE TYPE FLOW RATE   DURATION   DAILY USES   OCCUPANTS   GALLONS PER DAY
Showerheads,
residential
2.0 gpm @
80 psi
x 8 min. x 1 x Note 1a =  
Showerheads,
nonresidential
2.0 gpm @
80 psi
x 5 min. x 1 x   =  
Lavatory faucets,
residential
1.2 gpm @
60 psi
x 0.25 min. x 3 x   =  
Lavatory faucets
nonresidential/public uses
0.5 gpm @
60 psi
x 0.25 min x 3 x   =  
Kitchen faucets 1.8 gpm @
60 psi
x 4 min. x 1 x Note 1b =  
Wash fountains 1.8 gpm/20
[rim space (in) @ 60 psi]
x   x   x   =  
Metering faucets 0.25 gallons/cycle x 0.25 min. x 3 x   =  
Metering faucets for wash fountains 0.20 gal/cycle/20 [rim space (in.) @ 60 psi] x 0.25 min. x   x   =  
Water Closets 1.28 gallons/flush x 1 flush x 1 male2
3 females
x   =  
Urinals 0.125
gallons/flush
x 1 flush x 2 males x   =  
Total daily baseline water use (BWU) =  
  1. Refer to Table A, Chapter 4 of the California Plumbing Code, for occupant load factors.
    1. Shower use by occupants depends on the type of use of a building or portion of a building, e.g. total occupant load for a health club, but only a fraction of the occupants in an office building as determined by the anticipated number of users.
    2. Kitchen faucet use is determined by occupant load of the area served by the fixture.
  2. The daily use number shall be increased to three if urinals are not installed in the room.
WORKSHEET (WS-2)
BASELINE WATER USE
20-PERCENT REDUCTION WATER USE CALCULATION TABLE
FIXTURE TYPE FLOW RATE   DURATION   DAILY USES   OCCUPANTS   GALLONS PER DAY
Showerheads,
residential
  x 8 min. x 1 x Note 1a =  
Showerheads,
nonresidential
  x 5 min. x 1        
Lavatory faucets,
residential
  x 0.25 min. x 3 x   =  
Lavatory faucets
nonresidential/public uses
  x 0.25 min x 3 x   =  
Kitchen faucets   x 4 min. x 1 x Note 1b =  
Wash fountains   x   x   x   =  
Metering faucets   x 0.25 min. x 3     =  
Metering faucets for wash fountains   x 0.25 min. x   x   =  
Water Closets   x 1 flush x 1 male2
3 females
x   =  
Urinals   x 1 flush x 2 males x   =  
Urinals
Nonwater supplied
0.0 gal/ flush x 1 flush x 2 males x   = 0
Proposed water use (BWU) =  
20% Reduction ______________(BWU from WS-1) x 0.80 = _____________ Allowable water use

____% Reduction ______________(BWU from WS-1) x 0.____ = ____________ Allowable water use
  1. For occupancies, refer to Table A, Chapter 4, California Plumbing Code, for occupant load factors.
    1. Shower use by occupants depends on the type of use of a building or portion of a building, e.g., total occupant load for a health club, but only a fraction of the occupants in an office building as determined by the anticipated number of users.
    2. Kitchen faucet use is determined by the occupant load of the area served by the fixture.
  2. Includes single and dual flush water closets with an effective flush of 1.28 gallons or less.

    Single flush toilets - The effective flush volume shall not exceed 1.28 gallons (4.8 liters). The effective flush volume is the average flush volume when tested in accordance with ASME A112.19.2.

    Dual flush toilets - The effective flush volume shall not exceed 1.28 gallons (4.8 liters). The effective flush volume is defined as the composite, average flush volume of two reduced flushes and one full flush. Flush volumes will be tested in accordance with ASME A112.19.2 and ASME A112.19.14.
  3. The daily use number shall be increased to three if urinals are not installed in the room.
  4. Where complying faucets are unavailable, aerators rated at 35 gpm or other means may be used to achieve reduction.
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