How To Run A Pipe Through A Concrete Block Wall
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.
How to run a pipe through a concrete block wall. Seal off the drain hole in the wall with poured cement and caulking. Add 8 inches of coarse gravel above the drain pipe all the way around the foundation. When pipes pass through basement walls underground ground water can leak in around the pipes and through the concrete. A reinforced concrete foundation wall will typically have steel rebar running in both directions horizontally and vertically.
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. Builders use many techniques to run pipe through concrete block walls but the easiest and most efficient way is to use a core drill. Use the hole saw to cut a 4 1 8 inch circular hole in the concrete block wall. For larger pipe runs choose an inside wood framed wall.
Remove the wall surface up to the ceiling. 2 schedule 40 pipe is approximately 21 2 od it is not recommended that you run plumbing in the void of an icf wall and then pour concrete around it unless necessary. Feed the pipe through the hole and run it all the way around the foundation. I can see no evidence of excessive corrosion.
How to run a pipe through a concrete block wall. Step 5 finish filling the trench. 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. If you need to run a new stack assess your framing.
The only restriction that i recall is underground gas piping run through a foundation wall and or a slab. 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.