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Certified Backflow Prevention Services in Toronto and Surrounding Area

Backflow prevention services by S and J Plumbing
What is Backflow?

“Backflow” describes the unwanted reversal of the direction of flowing water. It is usually caused as a result of back pressure, which occurs when the pressure in a private water system is greater than the pressure in the municipal water system, or back siphonage, a problem caused by negative pressure in a water supply system that allows contaminated water to enter a potable water supply.

Backflow prevention piping
The Backflow Prevention Program

S and J Plumbing Services is a certified tester and contractor in the following municipalities:

  • Toronto

  • Markham

  • Halton Region

  • Hamilton

  • Vaughan

  • Kitchner

  • Waterloo


The Backflow Prevention Program works to ensure compliance with the Water Supply By-Laws and protection for the municipal water supply.

24/7 Emergency Services Available

If you have a plumbing emergency, you can give us a call no matter what time of day.

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