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TorontoBuilding PermitsPlumbing & Drains

Premise Isolation and Thermal Expansion Floor Mounted Tank

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 update
Also called
Backflow Prevention Information Templates - OMPAC-008-2025
For
contractor
Building types
All building types
Pages
1
Agencies
Ontario Municipal Plumbing Advisory Committee · Large Municipalities Chief Building Officials Committee
Covers note
Read from the page image — the PDF is a scan with no text layer. It is a drawing rather than a form, so these are the sheet's printed heading, its quoted article headings, the sizing block and the labelled entry blocks, plus the title block.
Instruments
CSA B125, "Plumbing Fittings"

Overview

Drawing OMPAC-008-2025 from the Ontario Municipal Plumbing Advisory Committee, linked from Toronto's forms index and its backflow prevention device permit guide. A single sheet pairs the text of Article 7.6.1.11 on thermal expansion with an isometric of two hot water tanks, a floor mounted expansion tank and the metered service, showing D.C.V.A. and R.P. backflow preventer options, the bypass, flushing valve, pressure test tee and city seal. Blank lines collect tank make, model, supply pressure, relief valve settings and device sizes.

What it covers

  • THERMAL EXPANSION TANK (FLOOR MOUNTED)
  • 7.6.1.11. Thermal Expansion.
  • A-7.6.1.11.(1) Thermal Expansion.
  • THERMAL EXPANSION TANK SIZING INFORMATION;
  • SIZE OF WATER DISTRIBUTION SYSTEM
  • TYPE OF BACKFLOW PREVENTER
  • SIZE OF BACKFLOW PREVENTER
  • SIZE OF BYPASS
  • SIZE OF METER
  • SIZE OF SERVICE
  • ONTARIO MUNICIPAL PLUMBING ADVISORY COMMITTEE
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Premise Isolation and Thermal Expansion Floor Mounted Tank

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