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Questions tagged [backflow-preventer]

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Irrigation system: Backflow Preventer -> Master Valve vs Master Valve -> Backflow Preventer

I am in the process of designing my irrigation system, and I saw many people install the backflow preventer (reduced pressure zone device) first and then connect to an automatic master valve. However,...
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access to backflow preventer assembly

My backflow preventer assembly access is in my basement and its right below the proposed vanity space in our proposed basement bathroom.(we have planned a 48 inch vanity , but if i cut down to a 36 ...
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Reinstalling backflow preventer. Do I need glue or grease or anything else

I am going to reattach my backflow preventer today (save 125 vs calling company). Do I need to apply any plumber grease or pipe glue to the pvc portion? Here are some pics of the preventer and place ...
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232 views

Is my vacuum breaker working properly?

I am in a newly rented house around 1 week and I don't know a thing about plumbing (not yet and I love projects for DIY). So my question is regarding this: I find this attached to the outdoor pipe ...