The seat is intact and clean on the edge. I also used a flash light to check out the bonnet, base, both intact. The water is clean. What's interesting is the other zone (B) valve is right next to this one in the manifold and I replaced solenoid, diaphragm, o-rings for both valves. Only this one is leaking. I noticed there's a pressure regulator that sits on the upstream to both zones, and the leaking seems to be less and the sprinkler works fine when turned on, BUT at this pressure the other zon...
I've got the similar but worse problem. All five sprinklers on this line are leaking, around the clock for months. I've replaced the diaphragm and solenoid. Anything else would you suggest to check? The valve is a Irritrol 100P1. Thanks for your thought.
