Member Knowledge Centre
member Knowledge centre
The Knowledge Centre provides CHBA members with access to information and resources. It is a growing resource that is currently focused on updating members about national building code information. Please note that this information is a benefit of your membership, and should not be shared beyond your company/organization.
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This information is provided by CHBA for informational purposes only and cannot be used as an official or authoritative document.
Task Group on Legionella in Building Water Systems
Task Group on Legionella in Building Water Systems
January 13, 2026
The main purpose of the fourth Task Group meeting was to review PCF 2174 Design of Potable Water Systems per Water Demand.
Calculator Method which provides the option of using the IAPMO Water Demand Calculator for designing potable water systems in residential buildings. The water demand calculator can be used to justify the use of smaller pipes and was adopted by the City of Vancouver with positive results. The Members of the Task Group were in full support of forwarding the proposed change to the National Model Code Committee on Indoor Environment for review and approval.
CHBA recommended the section on "Enforcement implications" be updated to highlight the need for training and that the "Who is affected" section be updated to outline what the impact will be in the listed individuals. CHBA also suggested that the Stantec report mentioned in the impact analysis be attached to the PCF in order to make it easy for reviewers to access the report. It was unclear if suggested edits will be made to the proposed change before it's shared with the National Model Code Committee.
For any questions, please contact Jack.Mantyla@chba.ca
Additional Info
Download File : 2030-04 TG-L Agenda Package.pdf