OakvilleBuilding PermitsSecond Suites

Sizing of Water Service Pipe

Published by Town of Oakville

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This is the Town of Oakville’s document, as published on its website on 22 October 2026. The municipality may have changed it since: check the current version at the source. Legal notice

Type: Form
Published by: Town of Oakville
Date: Revised April 19, 2026
Also called: Sizing of Water Service Pipe Form
For: designer
Signed by: Designer
Building types: All building types
Pages: 1
Instruments: Ontario Building Code Division B 7.6.3.1 · Ontario Building Code Table 7.6.3.4

Overview

Sizing of Water Service Pipe, a one-page Town of Oakville form revised April 19, 2026 for the water service of houses with one or two dwelling units. It restates the Ontario Building Code Division B conditions for using its tables, then sets out Part 1, a fixture unit calculation, Part 2, pipe sizes against hydraulic load at two water velocities, and Part 3, the design result, with designer name, signature and BCIN. It is the water service sizing form used across Oakville's house, addition, basement and alteration permit pages.

What it covers

PART 1 - Hydraulic Load (Fixture Unit Calculation)
PART 2 - Sizing of Water Service Pipe
PART 3 - Design of Water Service Pipe

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