I have an existing (old) 6" salt glaze surface water drain passing below the barn I am re-building.
I have noted a requirement to encase soil pipes under domestic buildings in 6" of concrete. In practice, this usually amounts to the builder putting a few inches on top of the pipe bedded on pea gravel.
I am reaching the point where exposing/re-newing/encasing are most practical and would welcome the group's views. In terms of *future proofing* a small extra effort now may pay off.
Discharge is to a ditch with ample rodding access so my choices seem to be:-
leave well alone.
expose and attempt to concrete encase
replace with a single run of 6" soil piping and cover with concrete. (The join would be outside the building)
or.... what about that Elephant trunk stuff?
regards