Our sump pump died. Actually it didn't die, the check valve died. It didn't really die, it just locked shut every so often and required us to reset the power on the sump pump. What a pain. We were also pumping about 4 gallons a minute out of the sump. I think I know what the problem is and I will re-grade one side of the house this summer.

Since I had already replaced the sump pump itself as well as some old clamps on each side of the check valve, the moral of this story is to replace all the components of the sump pump at the same time! An $8 part wasted several hours of my time as well as stressing me out.