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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

NC-2009 WEp1:Water Use Reduction—20% Reduction

testing of existing plumbing fixtures

Erin Holdenried

Sustainable Design Director

Bell Architects

LEEDuser Premium Member

40 thumbs up

Project location :

November 10, 2016

We have a project that is undergoing major renovation and most of the existing plumbing fixtures will me maintained, and their flush and flow rates have been tested under the 0.9 bar municipal-supplied water pressure. However, the baseline rates for lavatories requires testing at 4 bar water pressure, and showers require 5 bar. How can the project compare its water usage to the baseline? Has anyone encountered this issue on a project?

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