TorontoBuilding PermitsPlumbing & Drains
Thermal Expansion Tank (Suspended)
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
- April 6, 2025
- Also called
- Backflow Prevention Information Templates - OMPAC-007-2025
- Form reference
- OMPAC-007-2025
- 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-007-2025 from the Ontario Municipal Plumbing Advisory Committee, linked by Toronto Building beside its backflow prevention permit material. This single sheet shows premise isolation and thermal expansion piping with a suspended expansion tank on the cold or hot potable water system, next to the backflow preventer, water meter and hot water tank. It quotes Ontario Building Code Sentence 7.6.1.11 and has blanks for tank make, model, capacity, pressures, relief valve and temperature settings. Drawing OMPAC-006-2025 is the relief valve version.
What it covers
- Thermal Expansion Tank (Suspended)
- 7.6.1.11. Thermal Expansion.
- Thermal Expansion Tank Sizing Information
- Type and Size of Backflow Preventer
- Size of Water Meter
- Size of Water Service
- Minimum Size of B.F.P.
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