PVC pipes and fittings for external sewer systems are intended for gravity transport of wastewater with a pH value of 2–12 and temperatures up to +40ºC, or briefly up to +60ºC. Sewer pipes are used in underground non-pressure wastewater systems laid in the ground under or alongside roads, or in other places intended for utility communications, as well as in culverts through road embankments or in bridge structures built on roads. They are made from unplasticised PVC-U (polyvinyl chloride), a material with high strength, impact resistance and resistance to many chemicals. Pipes and fittings are orange-brown. The smooth surface prevents scale and sediment build-up. A simple and functional jointing system is used to connect the sewer pipes. Each pipe has a socket with a siliconised seal. The joint is very tight and installation is trouble-free.
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