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In the event it becomes necessary to install a wye branch this shall <br />be done by removing the length of a straight pipe and installing the wye <br />branch which shall be done by cutting the top of the bell of the adjoining <br />pipe and the bottom of the bell of the wye branch when the wye branch is <br />turned opposite to the direction to which it is to face in its permanent <br />position. Then insert the wye branch by lowering same horizontally in <br />place, then turn wye branch around by rotating same 180 degrees then caulk <br />the joint at each end of the pipe and seal the joint with the specified <br />hot compound jointing material, making sure that the entire joint is <br />properly sealed against leakage. Then place a 1.3 mix mortar envelope <br />around the entire pipe at each joint. The envelope to be at least twelve <br />(12) inches wide and four (4) inches in thickness. The bell hole shall <br />be dug out to completely encase the pipe at the joint. <br />The use of the double T's or tapping the sewer in the street by cut- <br />ting a hole in the pipe and inserting a straight pipe or use of saddle <br />hubs will not be permitted, except where large size concrete pipe is used <br />for the sewer main, in which case saddles are required. <br />(8) Cesspools. The sewer installer shall be permitted to'pump the <br />clear liquid content of septic tanks and cesspools into the lateral line in <br />the street with a centrifugal pump having a discharge line of 1=2 inches max- <br />imum diameter and he shall then flush the stub connection clean with a gar- <br />den hose for at least 15 minutes under the supervision of the Village <br />Plumbing Inspector. SlAdge which cannot be removed in the above manner <br />shall be pumped into tank wagons and removed. <br />All wooden and metal cesspools and septic tanks shall be pumped and <br />filled to eliminate the danger of future cave-ins. <br />(9) Tunneling. Tunneling for distances of not more than six feet <br />is permissable in yard, courts or driveways of any building site. When <br />pipes are driven the drive pipe shall be at least one size larger than the <br />pipe to be laid. <br />(10) Cover. The minimum cover over house connections shall be six <br />(6) feet in order to prevent freezing. Wherever possible the cover shall <br />be maintained at seven (7) feet. <br />SECTION 6. Independent Systems. <br />(1) The drainage and plumbing system of each new building and of new <br />work installed in an existing building shall be seperate from and indepen- <br />dent of that of any other building except where provided in (2) of this <br />section, and every building shall have an independent connection with a <br />public sewer when such is available. <br />(2) Where one building stands to the rear of another building on an <br />interior lot and no private sewer is available or can be constructed to the <br />rear building through an adjoining alley, court, yard or driveway, the build- <br />ing drain from the front building may extended to the rear building and <br />the whole will be considered as one building drain. Where such a building <br />drain is rear wall of the front building. <br />SECTION 7. Types of Wastes Prohibited. <br />(1) Except as hereinafter provided, it shall be unlawful to discharge <br />