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Mark C.



Tuesday, June 17th 2014, 7:55am

pulsing vibrations on newly installed drip zone

I recently installed a new drip zone on my system. when testing the zone it pulses and vibrates the pipes on the zone only. i have a hunter pgv valve with flow control and a hunter accu-sync 20psi pressure regulator installed on the valve. when the sprayers are spraying the water flow aslo pulsates


Supreme Member

Posts: 5,287

Location: Metro NYC


Tuesday, June 17th 2014, 9:17am

It's probably the regulator. These things can oscillate, in combination with the valve, often slowly enough up and down, that they call it "hunting." More pressure is usually the cure, but now that they have the fixed-pressure Accu-Sync, adjusting the pressure isn't an option, and other than trying a new diaphragm in the valve, assuming it's an older valve, there isn't any easy answer other than ditching the Accu-Sync in favor of a stand-alone pressure regulator.

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