Which blades do I want to use. Some 2 inch and will need to cut cut into the larger main 4 or 6 inch. This is under house in tight crawl space. Tried cutting a piece with a regular steel cutting blade probably a 14 tpi blade that was still in decent shape and wouldn't touch it. Was able to move to where a piece of 1.5 inch galvanized steel was used and blade cut right through.
Reciprocating saw blades for cast sewer pipe.
