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Starting Member

Posts: 1

Location: USA


Saturday, March 6th 2004, 9:23am

underground thumping

On one of 8 zones, there is a loud underground thumping, and the sprinkler heads for that zone do not fully activate. This usually lasts for about 10 minutes, then the thumping stops and the heads work properly. I thought of replacing the valve to that zone, but I don't know how to tell which of the 8 valves it is. What should I do?


Supreme Member


Saturday, March 6th 2004, 1:13pm

its most likely the valve diaphragm, follow the colored wire from the timer to the actual valve.


Advanced Member


Monday, March 20th 2006, 5:53pm

tom may be right again. 2 for 1000. also low pressure and an overloaded zone could be the prob.


Supreme Member


Tuesday, March 21st 2006, 5:23am

lush96, i invited you to bring your wit and wisdom over to the irrigation forum at many of the guys over there could benefit from your expertise. i for one have become a much more intelligent person since having the luxury of your experience presented in a clear and concise manner.


Supreme Member


Wednesday, March 22nd 2006, 6:05am

LOL..Tom? What is your alias over there?
Sprinkler Solutions, Inc.
Arizona and Colorado

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