Two of my Hunter PGP 4" sprinkler heads seemed to be working okay based on the throw of the water. But I noticed both had pools of water around their bodies, so I assumed there was a leak, perhaps around the cap, and replaced them.
At one of replaced heads, there was no longer a pool around the body or in the still-open hole. But the other one leaked a little while the zone valve was on, but continued to leak much more when the zone valve was off!
There are five heads on this zone. Due to the slope of the lawn, the leaky head head is downhill from the three that are closest to the manifold valve, so I figured that maybe gravity was a factor, not that it really should be. The leaking continued for at least 30 seconds after the zone valve was off.
One more head, a different model with a fixed 1/4 circle pattern, is at the bottom of the run. No pooling there.
Is my leaky, new head defective?
Thanks.
R1