SEC. 99.05.303. INDOOR WATER USE.

   (Amended by Ord. No. 186,488, Eff. 12/27/19.)

99.05.303.1.1. New Buildings or Additions in Excess of 50,000 Square Feet. Separate submeters or meters shall be installed as follows:

   1.   For each individual leased, rented, or other tenant space within the building projected to consume more than 100 gallons per day (380 L/day).

   2.   Where potable water is used for industrial/process uses, for water supplied to the following subsystems:

   a.   Makeup water for cooling towers where flow through is greater than 500 gpm (30 L/s).

   b.   Makeup water for evaporative coolers greater than 6 gpm (0.04 L/s).

   c.   Steam and hot-water boilers with energy input more than 500,000 Btu/h (147 kW).

   3.   For each building that uses more than 100 gallons per day on a parcel containing multiple buildings.

99.05.303.2. Water Use Reduction. Each building shall demonstrate a 20% overall reduction in potable water use. The reduction shall be based on the maximum allowable water use per plumbing fixture and fittings as required by the LAMC. To comply with this subsection, a calculation demonstrating a 20% reduction in the building "water use baseline", as established in LAMC Table 99.05.303.2.2, shall be provided.

   EXCEPTIONS:

   1.   Projects with plumbing systems having fixtures and fittings that comply with the maximum flow rate values shown in LAMC Table 99.05.303.2.3.

   2.   Additions and alterations to buildings with fixtures and fittings complying with the maximum flow rate values shown in LAMC Table 99.05.303.2.3. This provision shall apply only to new fixtures.

   3.   Buildings utilizing recycled water in accordance with LAMC Subsection 99.05.305.2.

   4.   Replacement of plumbing fixtures and fittings.

TABLE 99.05.303.2.2
WATER USE BASELINE3

 

FIXTURE TYPE	BASELINE FLOW RATE	DURATION	DAILY USES	OCCUPANTS 2
Showerheads	1.8 gpm @ 80 psi	5 min.	1	X 2a
Lavatory Faucets, Non-Residential	0.5 gpm @ 60 psi	.25 min.	3	X
Kitchen Faucets	1.8 gpm @ 60 psi	4 min.	1	X 2b
Metering Faucets	0.20 gallons/cycle	.25 min.	3	X
Water Closets	1.28 gallons/flush	1 flush	1 male 1 3 female	X
Urinals	0.125 gallons/flush	1 flush	2 male	X

 

Fixture "Water Use" = Flow rate X Duration X Occupants X Daily uses

1.   The daily use number shall be increased to three if urinals are not installed in the room.

2.   Refer to Table A, Chapter 4 of the California Plumbing Code, for occupant load factors.

   a.   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.

   b.   Kitchen faucet use is determined by the occupant load of the area served by the fixture.

3.   Use Worksheet WS-1 of the 2016 CALGreen Code to calculate baseline water use.

TABLE 99.05.303.2.3
WATER REDUCTION FIXTURE FLOW RATES

 

FIXTURE TYPE	MAXIMUM ALLOWABLE FLOW RATE
Lavatory Faucets, Non-Residential*	0.4 gpm @ 60 psi 0.20 gallons/cycle
Kitchen Faucets**	1.50 gpm @ 60 psi
Dishwashers	ENERGY-STAR certified
Clothes Washers	ENERGY-STAR certified

 

*   Not required if using nonwater or hybrid urinals throughout the project.

**   Kitchen faucets may temporarily increase the flow to 2.2 gpm at 60 psi, and must default to 1.5 gpm at 60 psi. This requirement does not apply to a faucet in commercial kitchens.

99.05.303.6. Standards for Plumbing Fixtures and Fittings. Plumbing fixtures and fittings shall be installed in accordance with the Los Angeles Plumbing Code, and shall meet the applicable standards referenced in California Plumbing Code Table 1701.1 and in Chapter 6 of CALGreen. (Amended by Ord. No. 185,198, Eff. 11/22/17.)