Flexible Manhole connection

Manhole connection fixes PE pipes into Concrete chamber walls.  A Manhole connector is necessary because, unlike rigid Ductile Iron or Clay pipes, PE pipes are subject to ongoing movement through temperature change and ground settlement. This causes small but constant changes in pipe length. This combined with expansion of the pipe OD as the concrete cures, means there is always a gap between the concrete and the pipe. If a Manhole connection is not used, sewage and waste water will continuously leak from the chamber, polluting ground water, leading to erosion and sinkage.

Puhui manufacture PE100 Electrofusion Sliding Manhole connector comprising of two components. The Electrofusion spigot end that fuses to the pipe and a socket end that is plastered into the manhole chamber wall.  The spigot features 2 x NBR sealing O-Rings and an expanding hydrophilic sealing ring between the sealing rings.