Backflow is the reverse flow of water into the municipal system, potentially caused by systems like fire sprinklers or pools.
Backflow Prevention
The Municipality of Thames Centre has put in place a Backflow Prevention Program, under By-Law 6-2019, to ensure that the treated water in any watermain, buildings, and homes stays free of any contaminants, pollutants, and un-potable water. The way in which this is done is by installing a backflow prevention device to the water connection to ensure no backflow event occurs.
The Municipality has partnered with Backflow Solutions Inc (BSI) for the organization and notification of annual backflow prevention device test reports and requirements. Annual backflow test reports and supporting documents can be submitted by clicking the submit a completed report button below.
FAQ's
A cross-connection is any link between the municipal water supply and non-potable water or hazardous materials, which can cause backflow.
Submit a Cross Connection Survey
Diagram

What is a Backflow Prevention Device?
A backflow prevention device allows water to flow in only one direction, preventing contamination. A testable backflow prevention device is required under By-Law 6-2019.
Backflow Preventers | |
Testable | Non-Testable |
Double Check Backflow Preventer |
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Reduced Pressure Principle Backflow Preventer |
Atmospheric Vacuum Breaker |
Pressure Vacuum Breaker Assembly |
Dual Check Valve |
Do I Need a Backflow Prevention Device?
Industrial, Commercial, Institutional, and Multi-Residential Buildings
Required for all buildings connected to the municipal water system.
Residential Homes
Required if you have any auxiliary water supply, private well, lawn sprinkler system, fire protection system, or any condition hazardous to the municipal water system.
Contact Us
Municipality of Thames Centre
4305 Hamilton Rd
Dorchester, ON, Canada, N0L 1G3
Ph (519)268-7334
Fax (519)268-3928
Kevin Willson
Environmental Services Superintendent
Ph (519)268-7334 x745
kwillson@thamescentre.on.ca
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