Supa Plus™ adaptor with tensile res. sealing ring for PE/uPVC-pipes - Bolt A2/Nut A4 Min. GGG40 for drinking water and neutral liquids to max. 70°C AVK Supa Plus™ is a range of tensile couplings, flange adaptors and end caps dedicated for PE and uPVC pipes. Supa Plus™ couplings offer a great flexibility and are very easy to mount due to the combined compression gasket which enables ±3.5° angular deflection and makes it easy to insert the pipe ends even in the large dimensions. The external M16 bolts of antifriction coated stainless steel and the high quality coating offer a durable corrosion protection.