The PE100 spiral wound pipe technology used by PKS Civil makes it practical to manufacture pipes to a specified ring stiffness/SN rating at a fraction of the weight. The high strength to weight ratio is due to the use of PP (polypropylene) core tube, which give the pipes their ribbed nature, wrapped in PE100 material. This means PKS Civil pipe systems can be installed as alternative solutions in gravity stormwater and wastewater settings over traditional pipe materials like steel, concrete and GRP.