Backflow Prevention and Testing in Canada

Periodic testing of backflow prevention devices is a vital service for the continued health and cleanliness of potable water. Our Expert plumbers in Canada can provide quality backflow device installation and maintenance as well as rigorous testing.

What is backflow?

Backflow refers to wastewater that has made its way back into your potable water supply. Often caused by an unexpected change in water pressure, the flow of used, nonpotable water reverses and creates what is known as a cross connection (where potable and nonpotable water meet). Backflow is often contaminated with waste materials, bacteria, chemical residue or other pollutants.

These substances can pose a serious risk to your health and safety, which is why backflow testing and prevention devices are so important. Whether you’re protecting your family or the public, professional backflow tests from Expert plumbers help keep you safe.

Plumbing tools

Frequently Asked Questions

When does my backflow device need testing?

  • Air Gaps (AG) shall be inspected at intervals not exceeding one (1) year to ensure that they continue to meet the requirements.
  • Double Check Valve Backflow Prevention Assembly (DC) shall be tested at intervals not exceeding one (1) year to ensure that both check valves hold pressure at 2.0 or greater under all pressure differentials.
  • Double Check Detector Backflow Prevention Assembly (DCDA) shall be tested at intervals not exceeding one (1) year to ensure that both check valves hold pressure and do not leak under all pressure differentials.
  • Pressure Vacuum Breakers (PVB) shall be tested at intervals not to exceed six (6) months (annually, if installed on an irrigation system) to ensure that the air inlet opens fully when water pressure and the check valve holds closed under pressure.

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