Single Leaking Head - Toro System
[?]Aplogies in advance for my lack on knowledge on this issue - I'm posting this for my 75-year-old dad. He's got a 5-zone Toro system. After the timer shuts the system off, a single head continues to leak a small volume of water. The leaking head is the 2nd head, and the highest placed head in its zone, with none of the other heads in that zone leaking.
Suspecting the master solenoid had gone bad, my dad (who's pretty handy) replaced the entire master solenoid valve with a new Watts dual valve. He showed me the problem, and I can't make any sense of it, either.
With a new master valve installed, NONE of the heads should continue to get any flow of water, even if a zone solenoid went bad. And why an elevated head would be leaking with system shut off, I can't understand. But sure enough - that one head has got water leaking out of it that only stops when the gate valves on the master solenoid are shut off.
Does ANYBODY have any insights into what might be causing this problem and how to fix it? Feel free to e-mail me directly in addition to posting.
Thanks in advance-
Walter Kneis
wk