Existing building laterals may be used in connection with new
buildings only when they are found, on examination and test by the
enforcement officer, to meet all requirements of this chapter.
In all buildings in which any building drain is too low to permit
gravity flow to the public sewer, wastewater carried by such drain
shall be lifted by mechanical means and discharged to the building
lateral, on approval by the enforcement officer.
All excavations required for the installation of a building
or street lateral shall be open trench work unless otherwise approved
by the enforcement officer. Pipe laying and backfill, regardless of
pipe material used, shall be performed in general accordance with
Paragraphs 3 through 6 of ASTM Specification C-12, except that the
trench width measured at the top of the installed pipe shall not exceed
24 inches, and except that no backfill shall be placed until the work
has been inspected. The depth of cover over the pipe shall be sufficient
to afford protection from frost, but in no case shall such depth be
less than four feet.
An interior cleanout fitting shall be provided for each building
lateral at a readily accessible location, preferably just inside the
basement wall. The fitting shall contain a forty-five-degree branch
with removable plug or test tee, and so positioned that sewer-cleaning
equipment can be inserted therein to clean the building lateral.