A lot of water gets under our house when it rains, and I dug a hole and installed a sump pump a few years ago. The hole has been collapsing over time so I've been forced to do something with it. This shows the sump hole (1 metre deep) with some of concrete I've installed so far. Dumb question I know - but have you tried putting the sump pump in there. I haven't teh measurement on me but the pipe is somethign like 750 - 1,000 mmYes, I have put my sump pump in the hole.