How do I enlarge an existing hole through concrete block?
I've got a 1 1/4" galvanized pipe for my sump pump drain going through the concrete block in my basement.
I just put a new, much larger pump in and I want to run 1.5" pcv out through the block.
Aside from chiseling and patching, how can I enlarge the hole from the 1.75" it is now to 2" so it will fit the pvc?
I'm used to wood hole saws which require a center for the pilot bit. Without a center, your hosed.
What equipment would be needed to create/drill this new hole?
And then, similar to another recent post of mine, how do I secure the pipe from sliding in and out of the hole? Is there some sort of clamp that would secure it to the wall?