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


--
Tim Lamb