"herlihyboy" wrote in message
ps.com...
I have a basement sump for my basement bathroom. It pumps up about 4'
to the main drain that goes out to my septic. We just bought the house
and I need to put a backflow check valve in it. How far between the
sump and the elbow that goes out should I put the valve? Does it
really matter? Didn't know if it should be down closer to the sump, up
where it goes out, in the middle, etc.?

Thx!


If I am reading this right you have a sewer sump and pump. The closer to
the pump the check valve is the less backflow you will have each time it
cycles. Be sure to make it clear when you are shopping for the valve that it
is for a sewer. There may be differences in the design that I am not aware
of since there will always be some particulate matter in the discharge.

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