Section 53-A. Drainage installations for chemical manufacturing, laboratories, processing or other liquids used for commercial or experimental purposes, that are subject to attack the materials hereinbefore specified for ordinary use, such as gray cast-iron, wrought-steel or copperized iron, lead, copper or brass waste-pipes are required, and subject to submit to such rules and specifications for other kinds of materials, as the local or State Board or bureau of health may require. In no case shall the materials used for this class of installation be less in quality or acid-resistance and strength than cast-iron, containing fourteen and one-quarter (14 1/4) per centum to fourteen and three-quarters (14 3/4) per centum silicon and not more than nine-tenths (0.9) per centum carbon, and have sufficient strength to permit all joints to be caulked with molded lead, in the same manner as other soil pipe hereinbefore provided. Outlets are a potential danger and must be trapped and vented when left either for convenience or future connection. No sanitary connection will be allowed to connect with an acid drain.
(53-A added Mar. 31, 1937, P.L.168, No.44)