MarkhamBuilding InspectionsInspections

Hot Water Piping Insulation

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: Guide
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. 24, dated January 1, 2025 and updated to the 2024 Ontario Building Code, on the energy-efficiency rule for pipes at a hot water storage tank; one of the City's housing tips. It quotes Article 12.3.1.4.: heat traps on inlet and outlet unless the tank has one or serves a recirculating system, and RSI 0.62 insulation on the first 2.5 m of outlet piping and the inlet pipe. The Objective quotes the Division A definition of residential occupancy and notes most tanks carry integral heat traps.

What it covers

12.3.1.4. Hot Water Piping Insulation
Objective
Typical Installation

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