Section 4.303 Indoor Water Use
The effective flush volume of all water closets shall not exceed 1.28 gallons per flush. Tank-type water closets shall be certified to the performance criteria of the U.S. EPA WaterSense Specification for Tank-type Toilets.
Note: The effective flush volume of dual flush toilets is defined as the composite, average flush volume of two reduced flushes and one full flush.
The maximum flow rate of kitchen faucets shall not exceed 1.8 gallons per minute at 60 psi. Kitchen faucets may temporarily increase the flow above the maximum rate, but not to exceed 2.2 gallons per minute at 60 psi, and must default to a maximum flow rate of 1.8 gallons per minute at 60 psi.
Note: Where complying faucets are unavailable, aerators or other means may be used to achieve reduction.
- Projects with plumbing fixtures and fittings that comply with the maximum flow rate values in LAMC Table 99.04.303.4.2.
- Additions and alterations to buildings where the new fixtures and fittings comply with the maximum flow rate values in LAMC Table 99.04.303.4.2.
- Buildings utilizing recycled water in accordance with LAMC Subsection 99.04.305.2.
- Replacement of plumbing fixtures and fittings.
|FIXTURE TYPE||BASELINE FLOW RATE||DURATION||DAILY USES||OCCUPANTS2|
|Showerheads||2.0 gpm @ 80 psi||8 min.||1||X 2a|
|Lavatory Faucets, Residential||1.2 gpm @ 60 psi||.25 min.||3||X|
|Lavatory Faucets, Common/Public Uses||0.5 gpm @ 60 psi||.25 min.||3||X|
|Kitchen Faucets||1.8 gpm @ 60 psi||4 min.||1||X 2b|
|Metering Faucets||0.25 gallons/cycle||3||X|
|Water Closets||1.28 gallons/flush||1 flush||1 male 1
|Urinals||0.125 gallons/flush||1 flush||2 male||X|
Fixture "Water Use" = Flow rate X Duration X Occupants X Daily uses
- The daily use number shall be increased to three if urinals are not installed in the room.
- Refer to Table A, Chapter 4 of the California Plumbing Code, for occupant load factors.
- Shower use by occupants depends on the type of use of a building or portion of a building. For example, the 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.
- Kitchen faucet use is determined by the occupant load of the area served by the fixture.
- Use Worksheet WS-1 of the 2016 CALGreen Code to calculate baseline water.
|FIXTURE TYPE||MAXIMUM ALLOWABLE FLOW RATE|
|Kitchen Faucets*||1.5 gpm @ 60 psi|
|Metering Faucets||0.2 gallons/cycle|
|Showerheads||1.8 gpm @ 80 psi|
|Clothes Washers||ENERGY-STAR certified|