The Series 621 supa plus coupling, is a tensile resistant coupling for PE and PVC pipes, suitable for use with water and neutral liquids (sewage), to a maximum temperature of +70°C.Features Lightweight design. Corrosion resistant construction. Fusion bonded epoxy coating. Angular deflection ± 3.5° per socket. Stainless steel bolt sets. WRAS certification. AVK recommend that Series 05 internal support bushes should always be utilised when used with Polyethylene pipe systems.To view the downloads available from this site you may need following free progr