18-29-604.4 Maximum flow and water consumption.

   The maximum water consumption flow rates and quantities for all plumbing fixtures and fixture fittings shall be in accordance with Table 18-29-604.4.

   Exceptions:

      1.   Blowout design water closets having a water consumption not greater than 3 1/2 gallons (13 L) per flushing cycle.

      2.   Vegetable sprays.

      3.   Clinical sinks having a water consumption not greater than 4 1/2 gallons (17 L) per flushing cycle.

      4.   Service sinks.

      5.   Emergency showers.

Table 18-29-604.4
Maximum Flow Rates and Consumption for Plumbing Fixtures and Fixture Fittings

Plumbing Fixture or Fixture Fitting	Maximum Flow Rate or Quantity a
Lavatory, private	1.5 gpm at 60 psi
Lavatory, public (other than metering)	0.5 gpm at 60 psi
Lavatory, public (metering)	0.25 gallons per metering cycle
Shower head b	2.0 gpm at 80 psi
Sink faucet	2.2 gpm at 60 psi
Sink faucet (residential kitchen)	1.8 gpm at 60 psi
Urinal	0.5 gallons per flushing cycle
Water closet	1.28 gallons per flushing cycle or equivalent dual flush c

 

For SI: 1 gallon = 3.785 L, 1 gpm = 3.785 L/m, 1 psi = 6.895 kPa.

a.   Consumption tolerances shall be determined from referenced standards.

b.   A hand-held shower spray is a shower head.

c.   A dual flush water closet where one third of the sum of the high flush volume plus twice the low flush volume is less than or equal to 1.28 gallons.

(Amend Coun. J. 10-14-21, p. 37722, Art. VI, § 7)