In my ongoing basement reno project, I am going to install a sump pit
and pump in the furnace room to deal with rare occurences of heavy
rains and high water table. I have a few questions.

The pits I've seen at HD and Lowes are 18" diameter and 22" deep. How
close to the foundation wall can I install it? Any concerns with
hitting the footing? My basement is solid concrete walls. Due to
clearance issues in the furnace room, the closer I am to the wall the
better. For a 18" diameter, should the hole be 21" diameter?

Also as far as the discharge pipe which 1 1/2" PVC. I have to go up
approx 8 feet, then 3 feet across horizontally .If I get a 1/3 HP
pump, can it handle that ?