All joints and connections shall be made gastight and watertight and capable of withstanding internal water pressure of ten feet head (4.3 p.s.i.) for one hour without visible leakage or failure.
(a) Cast iron pipe joints shall be the push-on type joint employing a rubber ring gasket which fits in an inside groove within the socket bell.
(b) Compression joints shall conform to A.S.T.M. Designation C425, the latest revision.
(c) O-Ring type round rubber joints shall conform to A.W.W.A. C302, the latest revision, Section 3.3 and Section 3.4, and shall be assembled as recommended by the manufacturer.
(d) Asbestos-cement pipe joints shall be made with rubber rings, shall conform to A.S.T.M. Designation D1869, the latest revision, and shall be assembled as recommended by the manufacturer.
(e) Other jointing materials and methods may be used only upon approval of the Loudoun County Sanitation Authority.