MarkhamBuilding InspectionsInspections

Protection of Plumbing Systems from Contamination (Water Treatment Devices)

Published by City of Markham

This is the City of Markham’s document, as published on its website on 18 October 2026. The municipality may have changed it since: check the current version at the source. Legal notice

Type: Map
Published by: City of Markham
Date: January 1, 2025
For: builder
Building types: All building types
Pages: 2

Overview

Markham's Builder Tip Issue No. 41, dated January 1, 2025 and updated to the 2024 Ontario Building Code, on connecting water treatment devices such as back-wash filters; one of the City's housing tips. It quotes Sentence 7.6.2.1.(1) on keeping non-potable water out of potable systems and Clause 7.4.2.1.(1)(e), which lists the devices, among them water treatment devices, connected indirectly to a drainage system. The Objective concerns back-wash filters approved by a recognized agency, and the tip illustrates acceptable ways to connect the filter's drain pipe to the house drainage system.

What it covers

7.6.2.1. Connection of Systems
7.4.2.1. Connections to Sanitary Drainage Systems
Objective

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