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18-29-605.17.1 Threaded joints.
   Threads shall conform to ASME B1.20.1. Pipe- joint compound or tape shall be applied on the male threads only.
18-29-605.17.2 Mechanical joints.
   Joints shall be made with an approved elastomeric seal. Mechanical joints shall be installed in accordance with the manufacturer's instructions.
18-29-605.18 Deliberately omitted.
18-29-605.19 Deliberately omitted.
18-29-605.20 Deliberately omitted.
18-29-605.21 Joints between different materials.
   Joints between different piping materials shall be made with a mechanical joint of the compression or mechanical-sealing type, or as permitted in Section 18-29-605.21.1.
18-29-605.21.1 Copper or copper-alloy tubing to galvanized steel pipe.
   Joints between copper or copper-alloy tubing and galvanized steel pipe shall be made with a brass converter fitting or dielectric fitting. The copper tubing shall be soldered to the fitting in an approved manner, and the fitting shall be screwed to the threaded pipe.
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