new tank

[at]

I have a new 230 gal. tank with a built in center overflow. It has 2-2" drains and 2-1" returns. My question is if I plumb one of the drains and returns to the sump and use the other drain and return as a closed loop would this work? What if the sump pump quit working would the closed loop pump flood the sump? Any input would be greatly appreciated.

Thanks Andy

[cubereefer]

If you allow for the volume that the closed loop holds in your "max fill" line in your sump, you should be fine. Ideally, your closed loop is a vacume, so the overflow level of your drains should still be your barometer as to how much overflow would occur in the case of an outage.

[at]

Makes sense

[Holdencraft 33]

Your closed loop shouldn't flood the sump but if your closed loop return drain isn't a couple of inches lower than the return drain you might run the closed loop dry.

[hummer]

lets see some pics..