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(A) Materials. The building sewer shall be cast iron soil pipe ASTM Specification (A74-42) or equal (or most current ASTM designation); or vitrified clay sewer pipe, ASTM specification (C-13-59T) or equal (or most current ASTM designation), or other suitable material approved by the City Engineer. Joints shall be tight and waterproof. Any part of the building sewer that is located within ten feet of a water service pipe shall be constructed of cast iron soil pipe with leaded joints or equal substitute. Cast iron pipe with leaded joints may be required by the City Engineer where the building sewer is exposed to damage by tree roots. If installed in filled, unstable ground, the building sewer shall be of cast iron soil pipe; except that, non-metallic material may be accepted if laid on a suitable concrete bed or cradle as approved by the City Engineer.
(B) Size and slope of building sewer. The size and slope of the building sewer shall be subject to the approval of the City Engineer, but in no event shall the diameter be less than six inches. The slope of such six-inch pipe shall be not less than one-eighth inch per foot. For larger sizes of pipe, the minimum slopes shall be according to all state and local regulations.
(1) Whenever possible, the building sewer shall be brought to the building at an elevation below the basement floor. No building sewer shall be laid parallel to any bearing wall if within three feet of any wall, which might thereby be weakened. The depth shall be sufficient to afford protection from frost. The building sewer shall be laid at uniform grade and in straight alignment insofar as possible. Changes in direction or grade shall be allowed only when a proper manhole is constructed at the location of the change.
(2) On all buildings for which the sanitary sewer drainage is to be conveyed by gravity to the sewer main, the lowest floor to be served shall be a minimum of three feet above the top of the sanitary sewer main. In all buildings in which the lower floor is too low to permit the gravity flow to the public sewer, sanitary sewage carried by such building drain shall be lifted by an approved means and discharged to the building sewer. The pumped sewage shall be connected to the gravity system of the building, at an elevation not less than three feet above the top of the sanitary sewer main.
(D) Lifting of sanitary sewage. In all buildings in which any building drain is too low to permit gravity flow to the public sewer, sanitary sewage carried by such drain shall be lifted by approved artificial means and discharged to the building sewer.
(E) Joints and connections.
(1) All joints and connections shall be made gas-tight and water-tight. All cast iron pipe joints shall be firmly packed with oakum or hemp and filled with molten lead, Federal Specification (QQ-L156) or most current federal specification not less than one inch deep. Lead shall be run in one pouring and caulked tight. No paint, varnish or other coatings shall be permitted on the jointing material until after the joint has been tested and approved.
(2) All joints in vitrified clay pipe or between such pipe and metals shall be made with approved hot-poured jointing material, approved rubber gaskets, oakum and Sewertite, Am-Vit or an approved equal method and material.
(3) Material for hot-poured joints shall not soften sufficiently to destroy the effectiveness of the joint when subjected to a temperature of 160°F, nor be soluble in any of the wastes carried by the drainage system. The joints shall first be caulked tight with jute, hemp or similar approved material. Other jointing materials and methods may be used only by approval of the City Engineer.
(1999 Code, § 51.034) (Ord. 818, passed 9-1-1977; Ord. 882, passed 9-5-1978) Penalty, see § 10.99