During some recent heavy rains one of my window wells filled with water, which started coming into the basement through the deteriorating window. I have a drain tile system around the interior of the basement walls but no drain around the exterior. (The house was built in the 40s, and the interior drain tile is a recent enhancement.)
In the two summers since it was installed, the sump pump has run very little. I've never actually noticed it running apart from when I test it, but the seepage I used to get on a regular basis from the bottom of the basement walls has stopped.
I'm considering installing drains in the window wells to connect to the interior drain tile. I have misgivings about intentionally channeling all that water through the inside of my house to the sump pump, though. While adding the window well drains seems like the obvious solution to keep the window wells dry, how much worse would it make a sump pump failure? Would it make a failure more likely because of the increased activity?