Hargreaves Halifax HD4009 100mm Cast Iron Grey Long Radius Bend 22 Degree

The Halifax HD4009 is drawn from the Halifax Drain range: a 100mm, 22 degree long radius bend, used to change the direction of a buried drainage run.

Design

• Geometry - The long radius sweep reduces turbulence and the risk of self-siphonage compared with a short radius bend, and is the preferred choice for bends at the base of a discharge stack, where BS EN 12056-2 recommends a minimum 200mm centre line radius.
• Material - Built from grey cast iron conforming to BS EN 877, coated to a minimum average thickness of 150 microns.

Settlement

Where pipework leaves a building or manhole and may be subject to settlement, the guide recommends at least two joints within 600mm of the exit point, acting as a short rocker pipe; the couplings used across the Halifax system are designed to accommodate up to 3 degrees of deflection, which combines with this short pipe length to absorb movement without compromising the joint.

Installation

• Jointing - Connects to Halifax Drain pipes using the same ductile iron or push fit couplings as the rest of the range.

See the manufacturer's Halifax Technical Guide for full dimensions and installation guidance.