DRAFT GreenPoint Rated Existing Home Rating Manual version 6.0 | Page 61

G

Plumbing

Field Verification: The Rater will complete field verification to confirm that the installed product meets specifications. Documentation: The Rater must collect documentation that shows that the minimum flow rate of the automatic compensation valve matches the minimum flow rate of the showerhead. Measures G2.2 and G2.3 Field Verification: The Rater must complete field compliance verification and take representative photos of fixtures. Documentation: The Rater must collect documentation that shows the flow or flush rate of installed fixtures, and a MaP score for toilets. If the flow rate is noted on the fixture, the Rater may complete field compliance verification without documentation only for these criteria. Upon the Rater’s discretion, a flow test performed by the Rater may also be used as an acceptable alternative method of verification. Measure G2.4 Field Verification: The Rater will conduct field compliance verification and take representative photos of urinals. Documentation: The Rater must collect documentation that shows the average flow rate for all urinals. Assume the flow rates for the flush urinals are the flow rates stamped on each urinal unit or found in the manufacturer’s literature. For urinals without flush valves (that is, zero-water urinals), assume the flush rate is zero gallons/minute. A narrative or worksheet must be supplied that calculates the average flow rate for all urinals (showing the number of urinals, the flow rate for each type, and the average flush rate calculation) unless all urinals are zero-water urinals (in which case only the final verification is required). INTENT To reduce indoor potable water consumption and pressure on delivery and sewage infrastructure. The U.S. Environmental Protection Agency (EPA) WaterSense program offers many fact sheets, product lists, and specifications.

G3.

PRE-PLUMBING FOR GRAYWATER SYSTEM

CRITERIA FOR QUALIFICATION Two points of credit is available for installing the pre-plumbing system necessary for a graywater system. At a minimum, pre-plumbing consists of installing all of the appropriate indoor plumbing drain assemblies to collect water from the desired sites (at a minimum, from the clothes washer or an equivalent volume) and stubbing out to the exterior, in order for the exterior plumbing for graywater distribution to be easily attached at a later date. VERIFICATION Field Verification: The Rater will conduct field compliance verification. Documentation: The Rater will collect an Accountability Form with the appropriate documentation signed by the builder, developer, architect, or system designer/installer, stating compliance with the building code and with this measure. GreenPoint Rated Existing Home Rating Manual Version 6.0, September 2013 © Build It Green 55