In the installation of the house connections to the house sewer laterals, the following standards are hereby established as to the pipe to be used.
Connections made to all buildings and dwellings shall use 60 pounds per length (five feet) of extra-heavy-weight cast-iron pipe of the best quality, no less than four inches in diameter, or Class 3300 asbestos cement pipe.
In the event that the existing house drain to which the house connection is to be connected is larger than four inches in diameter, then in such event, the pipe to be used in making such house connection must be of such larger size for its entire length.
Extra-heavy-weight cast-iron pipe or its equivalent in asbestos cement pipe shall be used in the installation of any house connection under driveways, under filled areas, or in any other area as may be directed by the Plumbing Inspector, whose decision thereon shall be final.
All pipes used in the installation of house connections shall be laid on a smooth bottom, with a special groove cut in the bottom of the trench for each hub (in order to give the pipe a solid bearing throughout its entire length). The soil shall be well rammed on each side of the pipe. Such pipe shall be laid with the joints properly caulked with lead or with rubber rings for asbestos cement pipe. The spigot end and hub ends shall be concentric.
All pipe used in the installation of house connections shall be so installed that the legend imprinted thereon indicating the weight of such pipe may be seen from above and shall be exposed for its entire length for examination and approval of the Plumbing Inspector.
The slope of the house connection shall be subject to the approval of the Plumbing Inspector, but in no event shall it be less than 1/4 inch per foot for four-inch pipe and shall not be less than 1/8 inch per foot for six-inch pipe.
The house connection shall be constructed at uniform grade and in straight alignment insofar as possible. Changes in direction shall be made only with properly curved pipe and twenty-two-and-one-half-degree fittings, and cleanouts shall be constructed as directed by the Plumbing Inspector at each and every bend.
Existing building sewers and existing laterals may be used with new house connections only when they are found on examination and test by the Plumbing Inspector to meet all requirements of this Part 2.