Anti-siphon advice


New member
Jun 1, 2014
Edmond, Ok
First post. Pool had line built in to hook to sprinkler system for daily/scheduled filling. I hooked it up on a zone with other sprinklers and it filled as planned. However, the sprinkler system is designed to drain from lowest sprinkler when zone goes off which caused a siphon from pool. I tried a couple of pvc backflow valves which didn't work. It appears i need an anti-siphon valve, but all i'm finding require above ground plumbing (12" above highest sprinkler). Is there a way to solve this problem without above ground plumbing?

Bama Rambler

Mod Squad
TFP Expert
LifeTime Supporter
Jun 22, 2009
SouthWest Alabama
I'm not sure why a check valve wouldn't work. It should only allow water to flow into the pool, but not back out of it. You may need to get a spring loaded one to ensure it closes when there's no forward pressure.