TorontoBuilding PermitsPlumbing & Drains
Thermal Expansion Relief (T.E.R.) Valve
Published by City of Toronto
This is the City of Toronto’s document, as published on its website on 20 October 2026. The municipality may have changed it since: check the current version at the source. Legal notice
- Type
- Form
- Published by
- City of Toronto
- Date
- March 29, 2025
- Also called
- Backflow Prevention Information Templates - OMPAC-006-2025
- Form reference
- OMPAC-006-2025
- For
- contractor
- Building types
- All building types
- Pages
- 1
- Covers note
- Scan with no text layer; headings read by eye from the page image.
Overview
Drawing OMPAC-006-2025 from the Ontario Municipal Plumbing Advisory Committee, linked by Toronto Building from its Backflow Prevention Device Permit page. This single sheet shows premise isolation and thermal expansion for water services up to 1-inch diameter, with a thermal expansion relief valve beside the backflow preventer, water meter and hot water tank. It quotes Ontario Building Code Sentence 7.6.1.11 on thermal expansion and has blanks for make, model and pipe sizes. Drawing OMPAC-007-2025 is the tank version.
What it covers
- Thermal Expansion Relief (T.E.R.) Valve
- 7.6.1.11. Thermal Expansion.
- Type of Backflow Preventer
- Size of Water Meter
- Size of Water Service
- Minimum Size of B.F.P.
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