Prevent backflow

You must have a valid permit before installing a device.

To install a device:

1. Hire an approved contractor – find a company on our approved list.
2. Complete a cross-connection survey – your contractor submits the survey form (PDF).
3. Apply for a permit – submit the backflow prevention permit application (PDF).
4. Submit the test report – after installation, send the test report (PDF) within 45 days.

City approval is required before removal.

Follow these steps:

1. Fill out the authorization to remove form (PDF) – one form per backflow prevention device.
2. Have your contractor submit the form – email it to the backflow prevention team.
3. Wait for approval – do not remove or disconnect equipment until the city approves your request.

Backflow test report: $28

• submit reports within 45 days of receiving the reminder letter to avoid late fees
• late submissions cost $56

Permit fees start at $85 – the total cost depends on how many devices you install and the cross connection survey review.

For an estimate, call 519-886-2310 or email backflowprevention@waterloo.ca.

The City of Waterloo makes no representation or warranty regarding the abilities, performance or quality of service of the testers listed. The City of Waterloo does not assume or accept any responsibility for the actions or performance of the testers. This list is only provided for convenience, and customers should use their own judgment when hiring testers. Use of this information is at your own risk.