Backflow prevention
Learn more about the backflow prevention program for drinking water, including survey forms, accredited testing companies, permit applications and applicable fees.
On this page
- What is backflow?
- Install backflow prevention devices
- Prevent backflow in your home
- Contact approved backflow prevention companies
What is backflow?
Our distribution system is designed to supply drinking water into homes and businesses. Backflow occurs if drinking water flows in the opposite direction: from homes and businesses back into our distribution system. This can result in pollutants and contaminants entering our drinking water.
Install backflow prevention devices
Our prevention program works with industrial, commercial, institutional and multi-residential property owners to prevent backflow into the drinking water system.
Property owners are responsible for installing, maintaining and testing backflow prevention devices, which require a permit to install.
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Installation process |
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Fees |
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Removal process |
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Prevent backflow in your home
Proper installation and regular maintenance of backflow prevention devices are essential to prevent water contamination.
Install a backflow prevention device:
- on all cross connections such as but not limited to irrigation systems, including both above-ground and inground setups, boilers, swimming pools and fire suppression systems
- use an approved backflow prevention device and get a permit
Test and maintain your device:
- testable backflow prevention devices are required to be tested annually
- keep hose ends clear of possible contaminants
- install vacuum breakers on threaded faucets and hose connections around your home. These devices are inexpensive and are available at hardware stores.
Contact approved backflow prevention companies
The following companies are registered with the City of Waterloo to work in compliance with our Backflow Prevention Bylaw.