The inner pipes are made of cross-linked polyethylene, which can withstand up to 95 °C fluid temprature inside it at a maximum pressure of 10 bars based on a 1.5 safety factor. Pipes are able to withstand short time temperature loading up to 110 degree.

Dezincification- resistant brasses

Dezincification resistant for hot working or die-casting have been given a sub section of their own because they are alpha brasses above about 550°C but alpha brasses in the heat treated condition in which they are used. The most important dezincification resistant brass is CUzN36Pb2As(CZ 132). It is most used in the form of hot stampings and items machined from

rod or bar, for the production of water fittings for us in areas where the supply causes meringue dezincification of alpha-beta brass. In the illustration of a stop tap, note the CR mark indicating that fitting of the same type, supplied by the same manufacturer, have been tested for dezincification resistance, as laid down in the BS@*&@ and BS2874 specifications for CZ132, and are approved by the water industry’s Fittings Approvals Board.