As stated above, in Southern California, my anti-siphon valve keeps draining out water. As soon as the sprinkler stops watering, the anti-valve part throws out lots of water. I have 2 other valves in my system that work just fine; no throwing out water. I just bought a new 3/4" Anti-Siphon valve thinking my old one was bad (I replaced 3 times) and the problem is still there. It throws out water like a heart...seems to heave after each throw-out. I can't explain it any better. Or...like the Tsunamis...they come in and then seem to go back out again. Never had this problem before and the location where the 3 installed Anti-Siphon Valves is getting soaked. I don't know what to do. It is manufactured by Orbit. Brand new and it acts like the older ones by Toro and Lawn Genie. Defects?

Are there any outlets on the valve circuit that are at a higher elevation than the valve?

I finally got my answer from the guy who put the sprinklers in...once the sprinkler turns off, all the water remaining in the line comes down the pipes and hits the anti-siphon valve, leaking all that water out. He says it's not a problem but he said the same thing as you, Steve...I need to put the valve higher than 2 feet! Or just leave it like that. Thanks so much for your reply, though. Funny thing...I did not get a notification that you responded to my question. I just got on on a whim and there you were! Thanks again and good night.



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The anti-siphon is suppose to be at least 6" higher than the highest sprinkler head.



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