Sewer backflow preventers are an essential part of your home's plumbing. Here's why you need one and how to test if yours is ...

Backflow preventers are essential in many commercial and some residential properties as they keep contaminated water from flowing backward out of your home and into the public drinking water supply.

They may also include test cocks for each chamber within the assembly. Backflow preventers have a variety of applications. For example, they are used to prevent boiler water, which may contain ...