Forum discussion

NC-v4.1 WEp2:Indoor Water Use Reduction

Design Flow Rate higher than Baseline

Hi,

I am working on a residential project that has bathrooms in an amenity space and spa. I believe these are classified as public lavatory (restroom) faucets with a baseline of 0.5 gpm. The installed fixture is actually 1.06 gpm, which exceeds the baseline flow rate. Is this fixture allowed and will just not contribute to overall % savings? Does every single fixture need to have a design flow rate that is less than the baseline?

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Fri, 11/15/2024 - 20:50

Hi Talia, I agree these would be considered public. It would be included in compliance/calcs, which will, of course, bring your aggregate savings down. As long as your other fixtures help offset these that are above the baseline, and you can still meet the Prereq 20% savings, you'll be fine. If you cannot meet that 20% overall reduction, you'll have to change some fixtures out for more efficient ones. Side note: If the spa area has handwashing sinks (only) in the spa rooms or other employee spaces as standalone fixtures, they can either be included, or be excluded as process water - your call. If you have some of these, and choose to exclude them as process water, just be sure to note it for the reviewers so that it's clear.

Wed, 03/18/2026 - 09:18

Dear Emily,I am currently working on a hotel project that includes specialized spa facilities (e.g., showerheads, sinks, etc.). Could you please advise where I can find guidance on whether these can be classified as process water?This is particularly relevant as maintaining a high-quality guest experience is a key project priority.Thank you in advance for your guidance.

Fri, 03/27/2026 - 21:20

I had a v2009 project that had a spa. In regular restrooms and showers, the criteria was the same that applied to any similar fixtures. If I remember correctly, these items had higher rates for "occupant experience", but when calculated alongside all of the building's other fixtures, our overall compliance was not affected.The hand wash sinks that were in each spa treatment room for the staff to use were able to be categorized as process water, similar to hand sinks for workers in a back-of-house cafeteria, or sinks in a doctor's patient room.

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