- 17 Mar 2022
- Reaction score
I need to make a small change to the direction of a soil pipe as it enters a sturdy old brick inspection chamber (private sewer, on my property). I've dug down past the bottom of the pipe; it's bedded in a large bit of incredibly hard concrete on the outside where it enters the chamber. Unfortunately it's an old clay pipe that seems to have a fine crack in the underside that runs right up to where it enters the concrete, so I guess it won't work to cut it off around there leaving a stub long enough for a clay->plastic transition (as I presume it will be finely leaking under the femco coupling). I also doubt it will be possible to break up the big mass of concrete to reach an undamaged section of pipe to cut without also cracking the pipe in the attempt. Is the best thing to do to break it up and chisel it out right through into the inspection chamber, leaving a hole large enough to get a 110mm plastic pipe through instead, then fit that through and seal up and make good so there's no bump or gap at the transition?-- if that's the case, is there a particular sand and cement mix I should use (or would it be the stuff they call grano)?