7.3.2.

(1) Every caulked lead drainage joint shall be firmly packed with oakum and tightly caulked with lead to a depth of at least 25 mm.

(2) No paint, varnish or other coating shall be applied on the lead until after the joint has been tested.

(3) Caulked lead drainage joints shall not be used except for cast iron pipe in a drainage system or venting system, or between such pipe and,

(a) other ferrous pipe,

(b) brass and copper pipe,

(c) a caulking ferrule, or

(d) a trap standard.

(4) A length of hub and spigot pipe and pipe fittings in a drainage system shall be installed with the hub at the upstream end.

(1) Wiped joints shall not be used except for sheet lead or lead pipe, or between such pipe and copper pipe or a ferrule.

(2) Every wiped joint in straight pipe shall,

(a) be made of solder,

(b) have an exposed surface on each side of the joint at least 19 mm wide, and

(c) be at least 10 mm thick at the thickest part.

(3) Every wiped flanged joint shall be reinforced with a lead flange that is at least 19 mm wide.

(1) In making a screwed joint the ends of the pipe shall be reamed or filed out to the size of the bore and all chips and cuttings shall be removed.

(2) No pipe-joint cement or paint shall be applied to the internal threads.

(1) Soldered joints shall be made in accordance with ASTM B828, “Making Capillary Joints by Soldering of Copper and Copper Alloy Tube and Fittings”.

(1) In making a flared joint the pipe shall be expanded with a proper flaring tool.

(2) Flared joints shall not be used for hard (drawn) copper tube.

(1) Mechanical joints shall be made with compounded elastomeric couplings or rings held by stainless steel or cast iron clamps or contained within a compression connection or groove and shoulder type mechanical coupling.

(1) Cold-caulked joints shall not be used except for bell and spigot pipe in a water system, a drainage system or a venting system.

(2) The caulking compound used in cold-caulked joints shall be applied according to the manufacturer's directions.

(3) Every cold-caulked joint in a drainage system shall be firmly packed with oakum and tightly caulked with cold caulking compound to a depth of at least 25 mm.