See all forum discussions about NC-v4 WEp2
 Subscribe to new posts about NC-v4 WEp2 Post a new question aboutNC-v4 WEp2
See LEEDuser’s guidance on NC-v4 WEp2»
FAQs about WEp2 :

How does the CEE Tier 3A criteria for commercial clothes washers compare to ENERGY STAR certified washers?

Is the WaterSense label really required, even if a non-labeled fixture has a comparable flush or flow rate?

Not all fixture types can get the WaterSense label. Which fixtures do we need to ensure have the WaterSense label for our project?

View answers »

Forum discussion

NC-v4 WEp2:Indoor water use reduction

Projects located where standard supply pressure is different than the LEED baseline supply pressure

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?

1
Post a reply

You rely on LEEDuser. Can we rely on you?

LEEDuser is supported by our premium members, not by advertisers.

Go premium for $15.95  »

Fri, 03/22/2019 - 05:47

Oh I made an error. I meant "baseline" water flow rates in different supply pressure.
Default Avatar
Green Lab
LEEDuser Basic Member
6 thumbs up

Fri, 07/03/2020 - 14:22

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  

Sun, 07/05/2020 - 23:21

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.
Default Avatar
Green Lab
LEEDuser Basic Member
6 thumbs up

Mon, 07/06/2020 - 08:56

Hi Maki, But those cutsheets of the equipment had the design water flow rates in pressure 415 kPa or other?  Thanks  
Default Avatar
Sara BENLOUBA
Green building manager
Confidential
LEEDuser Basic Member
13 thumbs up

Fri, 11/20/2020 - 14:55

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 ?
Profile picture for user bigm333
emily reese moody
Sustainability Director, Certifications & Compliance
Jacobs
LEEDuser Expert
469 thumbs up

Mon, 09/02/2024 - 20:12

Hi all, is this post of help for your situation? https://leeduser.buildinggreen.com/forum/how-can-i-check-conformity-technical-data-sheet-shower-head-0  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.
Profile picture for user andreyvkuznetsoff
Andrey Kuznetsov
ESG consultant, LEED AP BD+C
Self Employed
LEEDuser Basic Member
36 thumbs up

Thu, 09/05/2024 - 04:42

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).
Profile picture for user bigm333
emily reese moody
Sustainability Director, Certifications & Compliance
Jacobs
LEEDuser Expert
469 thumbs up

Fri, 09/06/2024 - 18:19

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.

Add new comment

To post a comment, you need to register for a LEEDuser Basic membership (free) or login to your existing profile.