HamiltonBuilding PermitsEvery building permit
Sizing of Water Service Pipe in a House Containing One Dwelling Unit
Published by City of Hamilton
This is the City of Hamilton’s document, as published on its website on 19 October 2026. The municipality may have changed it since: check the current version at the source. Legal notice
- Type
- Form
- Published by
- City of Hamilton
- Date
- August 24, 2022
- Also called
- Sizing of Water Service Pipe Form - One Dwelling Unit
- Form reference
- Ontario Building Code, Division B, Sentence 7.6.3.4.(6)
- For
- designer
- Signed by
- designer
- Building types
- All building types
- Pages
- 1
- Instruments
- Ontario Building Code, Division B, Table 7.6.3.2.A · Ontario Building Code, Division B, Table 7.6.3.4
Overview
The City of Hamilton Building Division's water service pipe sizing form for a house containing one dwelling unit, the counterpart to its more-than-one-dwelling-unit form. It sets out Sentence 7.6.3.4.(6) of Division B of the Ontario Building Code, under which a ¾ in. water service pipe serves a house where ¾ in. supply piping in the basement extends to the base of every hot and cold riser and the total hydraulic load stays at 26 fixture units or fewer. A fixture table totals that load and the designer signs with BCIN.
What it covers
- Part 1 - Hydraulic Load (Fixture Unit Calculation)
- Part 2 - Sizing of Water Service Pipe
- Part 3 - Design of Water Service Pipe
- Designer Information
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