All joints and connections shall be made gastight and watertight.
(a) Joints for Cast Iron Soil Pipe.
Type 1: Caulked joints for cast iron bell-and-spigot soil pipe shall be firmly packed with oakum or hemp and filled with molten lead not less than one inch deep and not to extend more than one-eighth inch below the rim of the hub. No paint, varnish or other coating shall be permitted on the joining material until after the joint has been tested and approved.
Type 2: A preformed joint is one where the gasket is inserted in a suitable hub and lubricated with an acceptable pipe gasket lubricant; then a suitable sized plain end spigot is inserted into the gasket and is pushed or drawn or driven until firmly seated in the hub, with the seal obtained by displacement of the gasket body to effect a double compression seal between the interior wall of the hub and the exterior wall of the pipe.
(b) Vitrified Clay Pipe Preformed Joints.
Type 1 includes those joints in which the same resilient material is used both on the spigot end and in the bell of the pipe, except that the material of one of the controlled complementary jointing ends, either in the bell or on the spigot, may vary in hardness from the other. These preformed ends, by controlled complementary design, will form a positive mating pattern of closure.
Type 2 includes those joints in which different types of materials having resilient characteristics are used in a similar manner as described for Type 1, except that the material of one of the controlled complementary jointing ends, either in the bell or on the spigot, may vary in hardness and resiliency from the other.
Type 3 includes those joints which rely upon a gasket or compression ring of a resilient material having a controlled and calculated shape which will be compressed within the annular space to form a closing seal, true round rings of rigid or flexible material placed on the spigot end and within the bell of the pipe form predictable dimensions within which the gasket will be compressed. The gasket or ring may or may not be attached to one or the other jointing faces prior to socketing.
(Ord. 182-91. Passed 11-18-91.)