Specifications include, but are not limited to: A. Copper Tube: Copper tubing shall be Type K meeting the requirements of Federal Specification WW-T 7996 and conforming to ASTM B-75, B-88 and B-68 as they apply to Type K Copper Tubing. B. Ductile Iron Pipe (4-inch to 16-inch): Ductile iron pipe used for exterior piping shall be manufactured in accordance with the latest revision of AWWA/ANSI C151/A21.51. Ductile Iron pipe shall be Class 52, centrifugally cast, double cement lined in accordance with AWWA/ANSI C104/A21.4, push-on joint or mechanical joint type, unless otherwise specified on the Drawings. Ductile iron pipe shall be supplied in 18- 20 foot lengths with factory applied bituminous coatings in accordance with AWWA C151.