It's also possible that your backflow preventer is near the main shutoff valve for your home. For a homeowner, the sewer backflow preventer usually will be above the ground, so you or your plumber ...

A big pipe carries waste from your house to the main sewer line under the street. If either becomes plugged or overloaded, ...

An Atikokan woman is suing the northwestern Ontario town after her basement was flooded in ... Bates said she asked the town for a backflow prevention valve that could prevent future floods ...