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Starting Member

Posts: 1

Location: USA


Sunday, April 18th 2004, 3:39pm

Did I break my backflow preventer?

Last fall, I had my sprinkler system professionally winterized.
This spring, I attempted to turn things back on myself.
Things went ok until I opened the valve between the house and the backflow preventer (a Febco PVB) - water poured out the top. I tried opening the value on the other side of the PVB, but water continued to pour out.

I tried tightening the nut atop the cover of the PVB. Due to overtightening, I broke one of the plastic forks inside the PVB. Removing the cover it looks like these forks hold the bonnet securely in place.

Can this be fixed or do I need to buy a new PVB?


Advanced Member


Sunday, April 18th 2004, 4:19pm

You probably won't have to replace the whole breaker. There are "guts" on the inside of the backflow preventer that can easily crack instead of the whole backflow preventer. Check to see what matches yours. Sounds more intense than just a torn O ring or something


Advanced Member

Posts: 229

Location: USA


Sunday, April 18th 2004, 5:27pm

Exact problem on our first season startup, Same backflow- Your freeze protect most likely is blown, You can get a repair kit for those. Im assuming its a 765 model.

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