"KJ" wrote in message
oups.com...
Hello All,

After the check valve, the sump drain pipe goes up about 2', then 90deg
elbow straight across the room and into a waste pipe. So the sump drain
pipe is right in the middle of the wall.

What I want to do is have the pipe go up straight 7' (to just below the
joists) before elbowing towards the waste pipe. Is this too high for
the sump to pump a column of water?

Well, its not too high, but you will reduce your capacity to maybe a quarter
of what it was at 2' and put more wear on the pump.
Unless you have an extremely good reason for it and the pump rarely cycles,
it is a very bad idea.