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Old 01-25-2010, 03:40 PM   #1
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Sump pump check valve


Where is the best place to locate the valve? Down by the pump itself or can it be located 5-10 feet above the pump?

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Old 01-25-2010, 05:44 PM   #2
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Sump pump check valve


The best place is down by the pump. If you have it a long way away, then every time it pumps out, there'll be a lot of effluent flowing back from where the check valve is into the basin again afterthe pump shuts off. It's not going to hurt anything, but you'll get a more complete "evacuation" if the check valve is closer to the pump.

The other possibility is that the pipe will hold a vacuum along that whole length up to the check valve (like holding your thumb over the end of a straw). In that case, your pump is going to have to overcome some excess resistance to pump out each time - could shorten the life of the pump.


Last edited by Ishmael; 01-25-2010 at 05:46 PM.
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Old 01-25-2010, 06:12 PM   #3
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Sump pump check valve


That's what I was afraid that the answer would be. Guess I'm going to have to get down and dirty in the sump pit.

Thanks
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Old 01-25-2010, 09:11 PM   #4
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Sump pump check valve


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Originally Posted by Ishmael View Post
The other possibility is that the pipe will hold a vacuum along that whole length up to the check valve (like holding your thumb over the end of a straw). In that case, your pump is going to have to overcome some excess resistance to pump out each time - could shorten the life of the pump.
Which is why they recommend drilling a small hole into the PVC pipe just after the pump connection.
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Old 01-26-2010, 12:59 PM   #5
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Sump pump check valve


just above the cover
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Old 01-30-2010, 02:02 AM   #6
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Sump pump check valve


i usually install the check valve one to two feet above the lid---since you most likely are using a -Y-
connector to tie into the main pump discharge line--it would be a lot easier to work above the lid--
in the pit your always short on space--so make it easy on yourself--
always drill an 1/8 inch hole 3 to 4 inches above the bottom of the pvc pipe--
that is done to prevent air lock which eliminates pump failure--
putting a check valve under the lid is crazy--it makes no sense--good luck


Last edited by coocoobe101; 01-30-2010 at 02:14 AM.
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