Sampling Water Fixtures in LEED v4 O+M

Green Building Team on October 28, 2019

Each month we’re highlighting an interesting question you posed to LEED Coach Canada regarding LEED v4/v4.1. LEED Coach Canada is supported by a collaborative team of professionals with diverse technical backgrounds located across Canada. For insightful answers to your LEED questions, email LEEDCoach@gbcicanada.ca.

Question: For the LEED v4 O+M Water Efficiency prerequisite: Indoor Water Use Reduction, is it acceptable to test a sample of water fixtures when manufacturer’s documentation is not available?

Jessica Heiss, LEED Reviewer, answers: If the manufacturer or testing company cannot provide the rated flow rate for fixtures installed within the building, project teams may use on-site tests to report the most accurate volume of water use. This should be done by testing a sample (i.e., 20%) of each installed fixture type at the building’s water pressure. The design case calculations would use the actual measured flow rate of the fixtures installed in the project, and the baseline calculations would use the LEED baseline flow rates included in the LEED v4 Indoor Water Use Reduction Calculator.

More News

Submission to the Pre-Budget Consultation 2025 Finance Canada

The Canada Green Building Council (CAGBC) is committed to ensuring that Canada’s building…
September 12, 2025

Investing sustainably in shifting markets, with Della Wang

A rising force in sustainable asset management, Della Wang is leading Fengate’s Responsible Investment…
September 10, 2025

Redefining inclusive and high-performance housing development in Winnipeg, with UWCRC 2.0 Inc.

By aligning deeply with community needs and demonstrating replicable low-carbon strategies, University of…
September 5, 2025

Call for Volunteers: Join the Learning and Development Volunteer Committee

The Canada Green Building Council (CAGBC) invites dedicated and passionate individuals to become…
September 4, 2025