PVC-U Repair Sliding Coupler SN8

  Datasheet (PDF)

The PVC-U sliding repair coupler SN8 SDR 34 is engineered for non-pressure buried gravity sewer and surface water drainage networks, providing an effective jointing and rehabilitation solution for exterior underground infrastructure. Manufactured from high-grade unplasticized polyvinyl chloride, the sliding sleeve features a completely smooth inner bore devoid of an internal central stop ridge, enabling the entire fitting body to slide freely along the pipe barrel during pipeline tie-in, maintenance, or damaged section replacement procedures. Once positioned across cut spigot ends, dual elastomeric EPDM lip gaskets housed within precision-profiled socket chambers compress around the pipe exterior to deliver a dependable, root-resistant, and water-tight seal that accommodates permissible ground settlement and axial movement. Rated for a nominal ring stiffness of SN8 (8 kN/m² corresponding to SDR 34), the structural profile withstands heavy earth loads and dynamic road traffic forces in buried installations at typical depths. The resilient PVC-U compound exhibits outstanding chemical resistance against aggressive soil agents, caustics, and domestic or industrial effluents across a broad pH range from 2 to 12, accommodating fluid temperatures up to 60 degrees. Engineered for optimal flow efficiency, the smooth hydraulic boundary minimizes friction, eliminates sediment deposition, and ensures reliable service throughout an expected operating life of at least 50 years.