How can a backflow preventer stop sewage from entering my basement?

A backflow preventer is equipped with a valve that will close when the sewer is surcharged.  During this time, your residence will be cut off from the sewer.  When the sewer is able to accept flow from your lateral, the valve will open and your lateral will drain into the sewer.

Show All Answers

1. How can my basement flood with sewage?
2. How can a backflow preventer stop sewage from entering my basement?
3. Is a backflow preventer required by the City?
4. What about clean water connections to the sewer with a backflow preventer?
5. What about maintenance?
6. Is there any financial assistance available for a backflow preventer?
7. What if I have more questions?