(A) Material: All house sewers shall be constructed of either vitrified glazed clay sewer pipe conforming to the ASTM standard specifications for clay sewer pipe (designation C-13) or extra heavy cast iron soil pipe conforming to ASTM standard specifications for cast iron soil pipe and fittings (designation A-74), or plastic sewer pipe or transite tile pipe.
(B) Joints And Connections:
1. Vitrified Glazed Clay Sewer Pipe: In jointing vitrified glazed clay sewer pipe, the spigot of one pipe must be carefully centered in the bell of the next pipe. All joints shall be firmly packed with oakum or jute in such a manner as to not disturb the alignment of the pipes, and in such way as to permit the joint compound to have the greatest unobstructed contact surface. Joints shall be formed by means of a hot poured bituminous compound or a cold troweled bituminous mastic compound.
2. Hot Poured Bituminous Joints: Hot poured compound shall consist of mineral filled plastic or bitumastic coal tar containing an inert filler which shall solidify quickly, have good adhesion, and possess high tensile and compressive strength, yet contain sufficient cold flow to yield without breaking when subjected to slowly applied compressive forces. It shall be permissible to make alternate joints before lowering the pipe into the trench.
3. Cold Troweled Bituminous Mastic Joints: Mastic compounds shall be troweled into the bottom one-third (1/3) of the bell of the first pipe laid. A closely twisted gasket of jute shall be used to center the spigot of the next pipe inserted in the bell. After the pipe has been properly bedded to line and grade, the entire remaining annular space shall be troweled full with the bituminous mastic compound. Cold applied mastic joints should consist of two (2) components: one, a dry powder composed of mineral bitumen, pulverized to the proper fineness and blended with a mineral filler and second, a liquid bituminous fluxing agent, which when combined with the powdered component, should form a homogeneous plastic compound. The compound should be of the internal set up mastic type and should not be such as to depend upon oxidation or evaporation to obtain its set. It should be self-hardening and should set up if submerged in water. It should be mixed on the job at the time used, and be of such consistency that it may be placed in the bells of the pipe and remain there without slumping.
4. Extra Heavy Cast Iron Soil Pipe: Joints for extra heavy cast iron soil pipe shall be made by inserting a roll of hemp or jute and thoroughly caulking it into place and then following with pure molten lead well caulked, not less than one inch (1") deep. No paint, varnish or putty will be allowed in the joints until they have been tested.
(C) Size Of House Sewer: No house sewer shall be less than four inches (4") in diameter. No building or house sewer for a commercial building or a multiple dwelling shall be less than six inches (6") in diameter.
(D) Grades For House Sewers: Unless otherwise authorized all house sewers shall have a grade of not less than one-eighth inch (1/8") per foot. A grade of one-fourth inch (1/4") per foot shall be used wherever practical.
(E) Trenching And Backfilling: All excavations shall be open trench work unless otherwise authorized by the sewer inspector. The foundation in the trench shall be formed to prevent any subsequent settlement of the pipes. If the foundation is good, firm earth, the earth shall be pared or molded to give a full support to the lower third of each pipe. Bell holes shall be dug to provide ample space for pouring of joints. Care must be exercised in backfilling below the centerline of the pipe in order to give it proper support. Backfilling shall be placed in layers and solidly tamped or packed up to two feet (2') above the pipe. Backfilling shall not be done until final inspection is made by the sewer inspector.
(F) Use Of Old House Sewers: Old house sewers or portions thereon may be approved for use by the sewer inspector. The sewer inspector may request that the old sewer be excavated for the purpose of facilitating inspection. No old cesspool or septic tank shall be connected to any portion of a house sewer that is also connected to the public sewer. (Ord. 219, 4-15-1963)