Silent backflow / check valve?

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Old 08-03-11, 09:16 AM
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Silent backflow / check valve?

We have a lift station/pump in our basement with a standard backflow/check valve.

Every time the pump runs it makes the sound of a car door slamming.

Are there any valves I can ask the plumber about that would be "silent" or much quieter?
 
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Old 08-03-11, 09:36 AM
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Hi,

You can add a check valve at the top of the line where it starts to go horizontal. The sound is waste water coming back down after the pump shut off, and slaming the check valve that is down by the pump. Like I said a additional check valve should reduce it significantly.

To verify listen when the pump shuts off. Does the sound happen a mere second after?

Mike NJ
 
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Old 08-03-11, 09:47 AM
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To verify listen when the pump shuts off. Does the sound happen a mere second after?
Yes it is definitely from when the water slams back down on the current valve.

Very good idea on changing the placement of the valve. Didn't think about that. So possibly getting a quieter valve and just moving it closer to the elbow should work? Or are you saying just put in a second one? Any issues with having 2 check valves?
 
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Old 08-03-11, 10:01 AM
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Note. Do not change the placement. Add a additional valve. No issues I know of of having two except reduced banging.

Mike NJ
 
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Old 08-03-11, 01:18 PM
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Ok thanks a lot. Any specific valve you recommend?
 
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Old 08-03-11, 01:27 PM
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I have no idea what a quiet valve or a loud valve brand would be. They all are of the same design.

Mike NJ
 
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Old 08-17-11, 08:22 PM
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check valve

I have seen this problem before . they do make a check valve with 2 checks in it one is soild flap second one is split in center you can get them at winnelson plumbing supply
 
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