One Check Valve for 2 Pumps

Hello,

I am installing a backup battery system for my sump pump. The backup pump uses 1 ½†PVC pipe for the discharge (same as main pump). Is is OK to use a PVC "Y" adaptor before the check valve so both pumps use the same check valve?

Thanks in Advance

nesquick97 said:

I am installing a backup battery system for my sump pump. The backup pump uses 1 ½†PVC pipe for the discharge (same as main pump). Is is OK to use a PVC "Y" adaptor before the check valve so both pumps use the same check valve?

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It won't work because the main pump will pump backwards through the backup pump.

You need a check valve at the discharge of each pump.