Use the hole saw to cut a 4 1 8 inch circular hole in the concrete block wall.
How to run a pipe through a concrete block wall.
Remove the wall surface up to the ceiling.
Add 8 inches of coarse gravel above the drain pipe all the way around the foundation.
If you are working with a concrete block foundation wall rather than solid concrete you may be able to use a carbide tipped core bit on a hammer drill to cut through the block walls.
Keep in mind you will not be able to use a pipe diameter larger than 21 2 in the walls from the foam to the concrete.
If you need to run a new stack assess your framing.
For larger pipe runs choose an inside wood framed wall.
When drilling a small hole through your reinforced concrete foundation wall you want to avoid placing the hole too close to the edge of the concrete and avoid hitting rebar.
Seal off the drain hole in the wall with poured cement and caulking.
Builders use many techniques to run pipe through concrete block walls but the easiest and most efficient way is to use a core drill.
I can see no evidence of excessive corrosion.
The only restriction that i recall is underground gas piping run through a foundation wall and or a slab.
Feed the pipe through the hole and run it all the way around the foundation.
A reinforced concrete foundation wall will typically have steel rebar running in both directions horizontally and vertically.
I do not recall any restriction based solely on the pipe penetrating through concrete although a sleeve would be a good idea for a couple of reasons.
How to run a pipe through a concrete block wall.
Step 5 finish filling the trench.
Many times shifting soil or a house settling can create a gap around the pipe and an escape route for water before it reaches the foundation drain pipe.
When pipes pass through basement walls underground ground water can leak in around the pipes and through the concrete.