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Wednesday, March 20th 2019, 12:54pm

PVB plus Anti-Siphon Valves - Overkill?

My property is sloping; the irrigation manifold is located at about the lowest point but all the irrigation water is routed through a PVB at the highest point before reaching the manifold about 10 feet lower. At the manifold are anti-siphon valves. They are quite old with numerous problems and I've decided the best course is to replace the entire manifold and valves. I'm thinking that since there is the PVB upstream of the manifold, anti-siphon valves aren't necessary and for aesthetic reasons I could choose to use inline valves instead. Is this correct, or are there reasons for keeping ASVs that aren't occurring to me?

(Note I'm not talking about reasons relating to local codes here, but technical reasons).



Posts: 2,343

Location: USA


Thursday, March 21st 2019, 12:55am

Go ahead and get rid of the anti-syphon valves. The PVB will do just fine. The Irritrol 2500 series valve is a good choice.

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