Ductile Iron Pipes - Socket & Spigot Flexible Push-on Joints

• Socket and Spigot Flexible Joints are assembled with synthetic EPDM (Ethylene Propylene Diene Monomer) / SBR (Styrene Butadiene Rubber) rubber gaskets of special shape - the gasket has a hard 'Heel' and a soft 'Bulb'.
• In Push-on joints, the soft bulb of the rubber gasket is compressed when the spigot is inserted into the socket.
• The 'heel' locks the position of the gasket and does not allow the gasket to get displaced when the spigot is pushed in.
• The joint becomes tighter with the increase in internal pressure of water. The rubber is confined in a place and cannot blow out.