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Metallic piping, except for cast iron, ductile iron and galvanized steel, shall not be placed in direct contact with steel framing members, concrete or cinder walls and floors or other masonry. Metallic piping shall not be placed in direct contact with corrosive soil. Where sheathing is used to prevent direct contact, the sheathing shall have a thickness of not less than 0.008 inch (8 mil) (0.203 mm) and the sheathing shall be made of plastic. Where sheathing protects piping that penetrates concrete or masonry walls or floors, the sheathing shall be installed in a manner that allows movement of the piping within the sheathing.
(Amend Coun. J. 10-14-21, p. 37722, Art. III, § 6)
Piping in a plumbing system shall be installed so as to prevent strains and stresses that exceed the structural strength of the pipe. Where necessary, provisions shall be made to protect piping from damage resulting from expansion, contraction and structural settlement.
Any pipe that passes under a footing or through a foundation wall shall be provided with a relieving arch. Alternatively, a pipe sleeve may be built into the foundation wall. Such sleeve shall be two pipe sizes greater than the pipe passing through the wall.
A water, soil vent or waste pipe shall not be installed outside of a building, in attics or crawl spaces, nor concealed in outside walls or in any other place subjected to freezing temperature, unless adequate provision is made to protect it from freezing by insulation or heat or both. Water service pipe shall be installed not less than 60 inches (1525 mm) below grade.
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