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Wednesday, June 26th 2013, 7:22pm

Author: benp84

Leaking PVB

I'm not sure if the water pressure is right. It appears to be working properly, but I suppose it might be a bit low. The problem I see with the partially-open valve theory is that the PVB still leaks even when the sprinklers are off. My physics background leads me to think that the pressure in the PVB would equal the pressure from the main water source if the water isn't flowing, as long as the valves are at least partially open. Does that sound right? It's hard to imagine how freeze damage coul...

Tuesday, June 25th 2013, 9:18pm

Author: benp84

Leaking PVB

Quoted from "Wet_Boots" Did you use all the replacement parts? Including the large O-ring? Is this still the original cover/bonnet? Yep, all of them. Large O-ring, bonnet and cover included.

Tuesday, June 25th 2013, 3:41pm

Author: benp84

Leaking PVB

I have a Watts 800M4FR pressure vacuum breaker. When I turned it on this year it started leaking from the top, apparently between the vent float and the bonnet. Information I found online suggested that I replace the faulty parts, so I did. In fact, I bought the full replacement kit and replaced every part in it, but it still continued leaking between the NEW vent float and bonnet. I rebuilt it two more times, even tried using the sealant paste that the parts come with between the vent float and...