No house sewer shall be laid parallel to or within three feet (3') of any bearing wall which might be thereby weakened. The house sewer shall be laid at a sufficient depth to protect it from frost.
All sewer and drain pipes shall be laid carefully in a trench in a straight line and on a straight grade. Where deviation from a straight run is necessary, it shall be made with a curve or other acceptable fitting.
In the bottom of the trench a groove shall be cut for each hub, in order to give the pipe a solid bearing for its entire length, and the soil backfill shall be well rammed on either side of the pipe.