Old 07-17-2012, 09:35 AM
LawnSite Senior Member
Join Date: Apr 2004
Posts: 396
Check Valve Whistling

My neighbor's above ground shallow-well irrigation pump is cycling about every three minutes (40 PSI down to 22 PSI). When it pumps up, it begins to whistle pretty loudly and the whistling decreases as the pressure drops.

There is a ball valve on the 1" PVC discharge side at the pump and I have it closed so I am pretty sure the problem is on the suction side of the pump.

The check valve is just above ground and when you put your ear on it, it seems like that is where the whistling is coming from.

Have any of you experienced this and was it the check valve?

Thanks !!!!

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Old 07-17-2012, 10:35 AM
Wet_Boots's Avatar
Wet_Boots Wet_Boots is offline
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Join Date: Mar 2005
Location: metro NYC
Posts: 44,762
Maybe it's a suction leak.
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