Blog: Filling and Backflow Prevention

The backflow preventer is a misunderstood piece of hardware in hydronic systems.  "My backflow preventer has failed.  It's dripping.  What should I do?"   It's easy to replace it.... but, has it really failed?  Likely the backflow preventer is doing it's job!  The culprit?  Debris stuck in the...

We get quite a few calls about and returns of perfectly good 573 Series backflow preventers because double-check atmospheric vent backflow preventers are not fully understood. Usually they have debris...