Polypropylene copolymer has been used for hot water piping in many countries and has a well established market. The material comes heat stabilized from the supplier. In South Africa the colour is normally red to distinguish it from other pipes. Installation of these pipes take into consideration the high thermal expansion of plastic materials compared to metals (roughly 10 times that of metals) and specialized fittings are used for connections, elbows and T pieces. It has several advantages over traditional materials viz. Thermal insulation as well as rapid and easy installation plus low comparative cost.
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