In LEED v4.1 WE Prerequisite: Indoor Water Use Reduction requirement, it reads:
Projects located where standard supply pressure is different than the LEED baseline supply pressure may calculate the water consumption of flow fixtures and fittings at the local standard supply pressure; the supply pressure must be consistent in the baseline and proposed case.
How can we show proposed water flow rates in different supply pressure? Are there baseline water flow curves we can refer to?
Takayuki Hirota
izumi CONSULTING, Inc.7 thumbs up
March 22, 2019 - 1:47 am
Oh I made an error.
I meant "baseline" water flow rates in different supply pressure.
Greenlab
Green Lab6 thumbs up
July 3, 2020 - 10:22 am
Hi Maki,
Have you solved this issue? I have posted a similar question in LEED v4.1 section but no one has answered. I'm about to submit the last review, but I'm quite worried that my interpretion is not right and we have to request for an appeal.
Thanks
Takayuki Hirota
izumi CONSULTING, Inc.7 thumbs up
July 5, 2020 - 7:21 pm
Hi Isabel,
No unfortunately we have not solved this issue. We decided to use cutsheets to show the design water flow rates when we cannot find the design fixture flow curves, and they were fine with our project.
Greenlab
Green Lab6 thumbs up
July 6, 2020 - 4:56 am
Hi Maki,
But those cutsheets of the equipment had the design water flow rates in pressure 415 kPa or other?
Thanks
Sara BENLOUBA
Green building managerConfidential
13 thumbs up
November 20, 2020 - 9:55 am
Hello Everyone,
We receive a data sheet from a manufacturer of a shower head but we do not know how to know if the flow rate meets the prerequisite,LEED or not, because the manufacturer did not clearly write the flow rate but they provided a curve of flow rate according to pressure (He gave the flow rates that correspond to pressures between 1 bar and 3 bars), while LEED specifies the flow rates that correspond to the pressure of 415 KPA / 4.15 Bar. What can I do knowing that the manufacturer does not give any flow value for 4.15 Bar ?
emily reese moody
Sustainability Director, Certifications & ComplianceJacobs
LEEDuser Expert
476 thumbs up
September 2, 2024 - 4:12 pm
Hi all, is this post of help for your situation? https://leeduser.buildinggreen.com/forum/how-can-i-check-conformity-tech...
There are two posts with the same title, so if the hyperlink doesn't take you to the one with the response that mentions v4 addenda 100001990, please search for the other.
Andrey Kuznetsov
ESG consultant, LEED AP BD+CSelf Employed
34 thumbs up
September 5, 2024 - 12:42 am
1. Link is not correct - one must delete "-0%C2%A0" from the end of the link.
2. At my project we converted flow for different pressure - plumbing engineers are capable to make it (Hagen–Poiseuille equation).
emily reese moody
Sustainability Director, Certifications & ComplianceJacobs
LEEDuser Expert
476 thumbs up
September 6, 2024 - 2:19 pm
Since there are two of these posts that are similar, I'll clarify in both locations.
Yes, there is something weird with the hyperlink. But if you delete the end part, it'll take you to a dead end. There are two posts with the same title "How can I check the conformity of a technical data sheet for a shower head?", so if the hyperlink doesn't take you to the one with the response that mentions v4 addenda 100001990 where Bipin Karki responded, please search for the other by just entering the post title.