Hargreaves Halifax HD4012 100mm Ductile Iron Drain Pipe Coupling

The Halifax HD4012 ductile iron coupling joins 100mm Halifax Drain pipes and fittings without a traditional spigot and socket joint, forming part of the socketless, mechanically jointed Halifax system.

Construction

• Body - Two-piece coupling manufactured from ductile iron to BS EN 1563, finished in grey 2-part epoxy to match the below ground Halifax Drain range.
• Gasket - EPDM sealing gasket, tested aligned, at 3 degrees of deflection and under shear force in accordance with BS EN 877.
• Fixings - Secured with 2 M8 zinc plated or stainless steel socket cap locking screws and nuts, using a 6mm Allen drive.

Electrical continuity

Below ground cast iron drainage can be required to maintain a continuous earthing path. The HD4012 includes a grub screw either side of the joint which is tightened through the coating to make metal to metal contact with the pipe. Independent testing at 25 Amps in accordance with BS EN 877:1999+A1:2006 Annex NA8 showed a resistance below 4% of the 0.3 ohm maximum the standard permits.

Fitting

• Assembly - Fit the gasket to the lower pipe or fitting first, line up the upper component squarely, then bolt the two halves together, tightening evenly rather than one side at a time.
• Torque - A torque wrench set to 15Nm is recommended to avoid over tightening.

Full jointing instructions are provided in the manufacturer's Halifax Technical Guide.