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Wednesday, October 25th 2017, 1:15pm

765 leaking when using compressor for winterization


I have read the thread that is titled 765 leaking when using compressor for Winterization. I am not sure I follow. I want to learn to do this myself instead of hiring someone to do it for the next 20 years. I have air leaking out of the top. I have been keeping my PSI at around 50. I am using a 12 gallon compressor. I did 3 zones no problem and then on zone 4 i ran into an issue, leaking air.
There are two valves to on the FEBCO PVB 765. There is a lower and an upper. I used the lower to blow out the first few zones of sprinklers. How do I get the PVB to seal so air does not escape again. Does opening top ball joint break the seal, should this be done after the sprinkler zones are blown out? If the air does not seal the valve again would using water pressure by turning on the sprinklers again? The image adding feature is not great on this forum so I cannot give a visual picture of the PVB.

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