Re: Checkvalve

Posted by hj on February 06, 2002 at 23:24:29:
In response to Re: Checkvalve
Without the check valve all the water in the pipe will drain back into the sump. In a worst case situation, that might be enough to make the pump start again, if the sump is small enough. : I have a sump pump discharge with a checkvalve about three feet above the pump. The 1-1/2" discharge line with a 20' run has an air gap at the end where the water is dumnped into a 3"x6' vertical line going to a leech field perimeter drain. Assuming that the purpose of the checkvalve is to prevent backflow and that the possibility of back flow is almost zero, do I need to have a checkvalve? I would like to eliminate the checkvalve to reduce the hammer I am getting when the pump stops and to drain back the water that is being trapped in the negative slope the plumber built in.

Posted by hj on February 06, 2002 at 23:24:29:

In response to Re: Checkvalve

Without the check valve all the water in the pipe will drain back into the sump. In a worst case situation, that might be enough to make the pump start again, if the sump is small enough.

: I have a sump pump discharge with a checkvalve about three feet above the pump. The 1-1/2" discharge line with a 20' run has an air gap at the end where the water is dumnped into a 3"x6' vertical line going to a leech field perimeter drain. Assuming that the purpose of the checkvalve is to prevent backflow and that the possibility of back flow is almost zero, do I need to have a checkvalve? I would like to eliminate the checkvalve to reduce the hammer I am getting when the pump stops and to drain back the water that is being trapped in the negative slope the plumber built in.

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