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FAQs about WEp1 :

Will the reviewers accept a spreadsheet as a plumbing fixture schedule in lieu of the plans from the Construction Documents?

In LEED review comments I've been referred to the Water Use Reduction Additional Guidance document. I didn't know this was a required reference document.

Should I include bar sinks? What about mop sinks or janitor sinks? Swimming pools? Safety showers? Bidets? Tub spouts?

We provided new showers in our project to comply with the alternative transportation credit. Should they be considered in WEp1 calculations?

Can you explain the 12-second duration for metering faucets?

Can I use a nonpotable water source to contribute to WEp1 compliance?

Our project does not have any eligible water fixtures in the project boundary. Can we comply with WEp1?

We are having trouble finding EPAct-compliant fixtures. Is that a problem?

Where can I find a clear meaning of "public" and "private" as relevant to lavatory faucets?

Our project is a factory with historically a 95% male workforce. The restroom design accounts for this. Can I argue that the male/female gender ratio is different than 50/50?

Are shower duration controls an acceptable water-saving strategy?

Can I include process water savings in order to earn an Exemplary Performance point?

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Forum discussion

CS-2009 WEp1:Water Use Reduction

WEp1 & c3 lav fixtures

charles bell

principal

theGreenTeam, Inc.

LEEDuser Basic Member

10 thumbs up

June 22, 2012

We are employing 0.5 gpm lav fixtures with sensors and timed cut off at 10 seconds. Can we factor those to 0.125 gpm because the average use will be say 20 seconds?

Post a reply

Carlie Bullock-Jones

Principal

Ecoworks Studio

LEEDuser Expert

148 thumbs up

Wed, 09/05/2012 - 22:24

Hi Charles, As outlined in the Water Use Additional Guidance document on the USGBC website (http://www.usgbc.org/ShowFile.aspx?DocumentID=6493) the default duration for a metering type / autocontrol faucet is 15 seconds for the baseline and 12 seconds for the design case; durations less than 12 seconds are not permitted for LEED calculations as shorter intervals are insufficient for typical hand washing. (e.g. a 0.5 gpm lav at 12 seconds would equal a 0.10 gpc metering fixture). Hope helpful!

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