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 working properly.

Every year a certified backflow assembly tester is contracted at a set rate to test every participant’s backflow device. To participate, call the utility’s backflow line mentioned above.

If Backflow Prevention Devices don't work properly, they can contaminate water. The town of Marana is asking homeowners to check theirs.