Have 3 heads on 1 zone. 1pgp rotor leaks from the top of the head(cap). The other 2 do not leak.Unscrewed the entire rotor, case and all down to the 90deg ell. Found water to be weeping from the ell, is this normal or is there a problem with the valve? like I said at the beginning, the other two rotors do not leak.Should I just replace the entire pgp rotor or is it a valve problem also. Constant flow of water.I did pick up a new diaphragm at the local sprinkler supply co.They think it is a bad d...
