DRAFT GreenPoint Rated Existing Home Rating Manual version 6.0 | Page 60

G

Plumbing G2.1. WaterSense Showerheads with Matching Compensation Valve (2 Points)

Showerheads must be WaterSense® certified with a flow rater of ? 2.0 gallons per minute and installed with matching compensation valve. The automatic compensation valve must be rated for the minimum flow rate of the showerhead. The automatic compensation valve must meet one of the following standards: ? ? ASSE 1016 Performance Requirements for Automatic Compensating Valves for Individual Shower and Tub/Shower Combinations ASME 112.18/CSA B125.1-05, Plumbing Supply Fittings

Any shower with more than one showerhead or hand-held unit that has the possibility of rinsing the same person at the same time automatically disqualifies the home from meeting this measure. A large shower stall with multiple showerheads will qualify if the showerheads cannot be used by a single person at the same time and if all showerheads meet the flow rate requirements. G2.2. WaterSense Bathroom Faucets with a Flow Rate ? 1.5 Gallons/Minute (1 Point)

Residential lavatory faucets should have a flow rate ? 1.5 gallons/minute. Non-residential metered faucets should have a flow rate ? .25 gallons/minute. The flow rate mechanism may be factory installed or an accessory. G2.3. WaterSense Toilets with a MaP Threshold of No Less Than 500 Grams (1 Point)

All toilets must comply with this measure to earn credit. Retrofit or after-market kits to convert a standard toilet to a dual flush toilet are prohibited. Toilets must qualify as high efficiency, with 1.29 gallons per flush or less with a MaP score of 500 grams or greater. G2.4. Urinals with an Average Flush Rate of ? 0.1 Gallons/Flush (2 Points)

Note: This measure applies to multifamily projects only. All urinals must have an average flush rate of ? 0.1 gallons per flush. No-water urinals comply with this measure. To calculate the average flush rate, add up all of the urinals installed in the building at the time of project completion (including non-residential tenants). Add up the flow rates of each urinal, and divide that total by the number of units. To test for toilet flow rate, measure the amount of water it takes to refill the tank as follows: ? ? ? ? ? Turn off the water supply to the toilet. Mark the full water level on the inside of the tank with a crayon, pencil, or marker. Flush the toilet. Manually fill the tank to the mark in the tank, keeping track of the volume of water added. Turn the water supply back on.

Note that code issues may arise for projects considering the use of waterless urinals; check with the city building department for more information. VERIFICATION Measure G2.1

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GreenPoint Rated Existing Home Rating Manual Version 6.0, September 2013 © Build It Green