u/Forward-Bison6782

My town is doing home inspections and my house got flagged for being out of compliance. I guess my sprinkler valves are lower than the heads, something done by a previous owner. There is some confusing on my part and also some discussion locally on nextdoor as to whether we can use standard anti siphon sprinkler valves 12 inches above the lowest sprinkler head, or if some type of backflow preventer would be needed. It seems to me the anti siphon sprinkler valves would do the job. Also, not sure how water would even be able siphon back into the supply line since the water on the supply line side is at 60 psi.