On 12 Mar 2007 08:31:11 -0700, "
wrote:


Our sump had been making a BANGING noise at the end of each cycle.
Reading up about that, I determined it must be a bad check valve.

I don't have a check valve, but was considering putting one in.

What say you all, do they all make a bang at the end of the cycle? Or
even a noise?

I was considering instead of a battery backup sump pump getting that
water powered thing, a bit cheaper but but more work to install.

If the check valve is going to go BANG, I would rather get the water
powered thing.