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Old 12-11-2014, 02:29 PM   #1
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Irrigation anti siphon


Hello all,

I'm building a sprinkler system and by code I have to put an anti siphon valve in front of the valve manifold. I'm putting in-grown inline valve.

I went to a big box store and wasn't sure of the feedback I received from the rep.

Do I need a specific anti siphon valve or can a regular zone anti siphon valve will do. In my opinion, zone valve comes in two favors 1) inline and 2) anti siphon. But do I need a specific one or different kind to place in front of all the zone valve or manifold?

Thanks
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Old 12-11-2014, 04:12 PM   #2
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There are 4 different types of anti-siphon/backflow preventers for irrigation systems.
http://www.sprinklerwarehouse.com/DI...ice-s/6782.htm
You can check with your building dept or water dept to see what is required in your area.
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Old 05-14-2015, 12:07 AM   #3
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You need to see what is required in your municipality. When I re-did my irrigation system I installed anti-siphon valves and they have worked great. Also they have to be a certain height from the highest sprinkler in the system.
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