Service lines from the Y-branch or new tap of the sewer main
to the property line shall be constructed or installed by the property
owner and maintained by said property owner at his expense.
The house sewer from a point three feet outside of the house
to the street sewer shall be of the first quality, salt-glazed, vitrified
earthenware pipe, asbestos-cement pipe or cast-iron pipe, with deep
and wide sockets, unless laid less than two feet deep, when it shall
be of heavy cast iron. Its diameter shall be not less than four inches.