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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

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

Water use test report

In case the the manufacturer does not have the cutsheet showing the water data, can we do the on-site measurement and adjust the flowrate to be used in the calculation? We plan to do the elaborated test report by measuring all fixtures used with contractor and CxA. Is it necessary to get the letter from the manufacturer to confirm the onsite test report?

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Profile picture for user tristanroberts
Tristan Roberts
Representative
Vermont House of Representatives
LEEDuser Expert
7780 thumbs up

Sat, 07/26/2014 - 05:26

Jatuwat, it seems unusual that a manufacturer could not give you a flow rate for their fixture, and it makes me worry that their fixtures will not offer consistent performance, but it seems reasonable to use rigorous data from a CxA.
Profile picture for user michael.smithing
Michael Smithing
Director - Green Building Advisory
Colliers International Ltd.
LEEDuser Basic Member
201 thumbs up

Tue, 08/25/2015 - 10:23

I have had success using this strategy on projects in Africa where manufacturer information (for Chinese fixtures) did not include flush/flow information or where base-build information was unavailable from the landlord. I've referenced the EBOM testing requirements.

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