[LazyPup]

Using concrete, cement or hydraulic cement is absolutely prohibited by the plumbing codes. Under no circumstances may a pipe be in direct contact with any cement product when passing through a wall.

The code requires that when a pipe is run through a masonry wall the pipe MUST BE sleeved.

To create a sleeve you must first install a piece of schedule 40 galvanized iron or schedule 40 PVC pipe that is two nominal trade sizes larger than the desired pipe, and which passes through the wall and extends out at least 2" on either side. The sleeve may be cast into the concrete during the initial pour, placed through a block wall while the wall is being constructed or it may be installed afterwards and sealed to the masonry with cement, tar pitch or expansion foam,

The desired pipe is then installed through the sleeve and the space between the inner wall of the sleeve and the exterior wall of the desired pipe is to be sealed with expansion foam.