Quote Originally Posted by cjanlui View Post
I do have a pump to my overflow. It's a CPR overflow with a pump connected to an air suction line.

If you have the right overflow, there is no need for a pump. My overflow has a partition in the back, the tube goes on one side and the drain on the other. when the power goes out, about 3 inches of water is left in the tube side of the partition, and the suctoin is maintained. Had a 4 hour outage the other day w/o a drop on the floor, and it went right back to work when everything came back on.