18-29-705.7.4 Threaded joints.

   Threads shall conform to ASME B1.20.1. Pipe joint compound or tape shall be applied on the male threads only.

18-29-705.7.5 Welded joints.

   All joint surfaces shall be cleaned. The joint shall be welded with an approved filler metal.

18-29-705.8 Copper tubing.

   Joints between copper or copper-alloy tubing or fittings shall comply with Sections 18-29-705.8.1 through 18-29-705.8.3.

18-29-705.8.1 Brazed joints.

   All joint surfaces shall be cleaned. An approved flux shall be applied where required. The joint shall be brazed with a filler metal conforming to AWS A5.8.

18-29-705.8.2 Mechanical joints.

   Mechanical joints shall be installed in accordance with the manufacturer's instructions.

18-29-705.8.3 Soldered joints.

   Solder joints shall be made in accordance with the methods of ASTM B828. All cut tube ends shall be reamed to the full inside diameter of the tube end. All joint surfaces shall be cleaned. A flux conforming to ASTM B813 shall be applied. The joint shall be soldered with a solder conforming to ASTM B32.

18-29-705.9 Borosilicate glass joints.

   Glass-to-glass connections shall be made with a belted compression-type stainless steel (300 series) coupling with contoured acid-resistant elastomer compression ring and a fluorocarbon polymer inner seal ring or with caulked joints in accordance with Section 18-29-705.9.1.

18-29-705.9.1 Caulked joints.

   Every lead-caulked joint for hub and spigot soil pipe shall be firmly packed with oakum or hemp and filled with molten lead not less than 1 inch (25 mm) deep and not to extend more than 1/8 inch (3 mm) below the rim of the hub. Paint, varnish or other coatings shall not be permitted on the jointing material until after the joint has been tested and approved. Lead shall be run in one pouring and shall be caulked tight. Acid-resistant rope and acid-proof cement shall be permitted.