WE3: Indoor Water Use. Maximum Points - 6
(Page 52) No prerequisites for this section. Credit 3.1 is for High Efficiency Fixtures and Fittings and is worth up to 3 points. Credit 3.2 is for Very High Efficiency Fixtures and Fittings and is worth up to 6 points. Under each of these credits, there are three headings: a. Lav faucets; b. Shower heads; C. Toilets. Take toilets for example. If you meet the criteria for heading C under credit 3.1, you get one point and you don't qualify for the two points under Credit 3.2. and vice versa.
For lav faucets to meet 3.1, you have to be equal to or less than 2.0 gallons per minute. To meet 3.2, you have to be equal to or less than 1.5 gallons per minute OR the fixture needs to be WaterSense labeled. We are using a
Hansa fixture and meet the criteria of credit 3.2
For shower stalls to meet 3.1, you have to be equal to or less than 2.0 gallons per minute PER STALL. This means you aren't going to be able to install 6 shower heads in the master bath shower with each shower head being low flow..... To meet 3.2, you have to be equal to or less than 1.75 gallons per minute per stall. We are using a Hansgrohe fixture that meets the criteria of credit 3.2.
For toilets to meet 3.1, you have to be equal to or less than 1.3 gallons per flush OR dual flush OR water sense labeled. To meet 3.2, you have to be equal to or less than 1.1 gallons per flush. We are using a Toto fixture and meet the criteria of credit 3.1 (it is dual flush and WaterSense labeled).
From this section we earn 5 points!