Regularly removing unions - any issues? (irrigation PVB)

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MikeCO

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When I installed my irrigation backflow preventer (1" FEBCO 765), I added unions to make it easy to replace/remove. I have seen that some people entirely remove the backflow preventer during the winter to prevent any freezing - if I do that, is there any concern that regularly removing / reattaching the unions once a year is going to cause the union connections to fail/leak? I like the idea of bringing it inside but wanted to get this group's opinions. In either case, I'll be blowing out/draining the entire system, but I know that some water can remain inside the PVB.
 

Jadnashua

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Depending on the material of the union, if you overtighten it, you can put a ridge on one of the mating surfaces that can make sealing the next time harder.
 
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