A. 
The house trench shall be dug so as to meet the public sewer at the position of the Y-branch or Y-branch extension if available, as located by the Superintendent.
B. 
The material thrown from the trench shall be placed so as not to obstruct and so as to cause the least inconvenience to the public.
C. 
Whenever the sides of the trench will not stand vertically, sheeting and braces shall be used to prevent unnecessary caving.
D. 
In backfilling, the earth shall be carefully rammed so as to keep the pipe in proper position and avoid settling, and no stones shall be used in filling until there has been a depth of two feet of fine earth or gravel placed over the pipe.
E. 
All pipes laid within the paved right-of-way of any public street shall be laid in and backfilled with run-of-bank gravel.
A. 
Where rock is found in the bottom of the trench, it shall be taken out six inches below the required grade of the pipe and the space filled with sand, gravel or other suitable material thoroughly rammed.
B. 
No blasts shall be fired within five feet of the public sewer or any private sewer or drain connecting therewith or a water main, and the utmost care shall be taken to prevent injury thereto.
The building sewer to the street sewer shall be of the first-quality asbestos-cement or vitrified earthenware 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.
A. 
The cover of the Y-branch on the sewer shall be carefully removed so as not to injure the socket. The first length of the pipe attached to the Y-branch shall be set so as to give a good fall into the sewer.
B. 
The pipe shall be laid on an even grade of not less than 1/4 of an inch to the foot.
C. 
In making any deflection from a straight line, the pipes must be selected so as to give close, smooth joints, and when this cannot be done with straight pipes, special bends must be furnished. All branch sewers shall be run as nearly as possible to a straight line from the main sewers to the nearest point in the cellar and, where possible, shall be left so that such branch can be cleaned from the cellar.
D. 
All pipe joints shall be tightly connected using O-ring rubber compound joints.
E. 
The ends of all private sewers not immediately connected with the plumbing fixtures shall be securely closed by watertight imperishable material.