A lack of knowledge in South Africa about the use of polypropylene (PP) for sewer and drainage pipes and fittings for underground gravity sewers and drains may lead to the premature failure of sewer lines if incorrect products are specified.
While PVC sewer fittings are all rated 400 KPa (SN 8), both SANS 8773 and SANS 21138 allow lower stiffness ratings for fittings. A lower stiffness rating makes for a thinner wall thickness and therefore a cheaper product. Low stiffness pipes and fittings are intended for use in shallow drains, whereas SN 8 (400 kPa) pipes and fittings can be used in all drains and deep sewers.
PP vs. PVC for pipes and fittings for sewer, drainage applications
DPI Plastics racks up orders in large-bore water infrastructure projects
Latest specification for PE piping systems
Ultrapipe from DPI Plastics promotes PVC recycling
DPI Plastics invests heavily in back-up power supply
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