plumbing question

[Myka]

Originally Posted by marks69

i went with 2 on my tank. both can be cleaned easily, and get done every couple of months. i figure it's part of my insurance.

Why wouldn't you leave enough room in the sump to take the back flow? To me that is much better insurance...it's fail safe.

Originally Posted by daveycoopa

What is a flapper valve? Never heard of one.

It's a type of check valve. It's supposed to prevent back flow of water during a power outage.