Pushon Joint Ductile Iron Pipe | High Strength & Corrosion Resistance

Push on joint ductile iron pipes feature a socket and spigot design with a pre installed rubber gasket, enabling rapid and tool free installation. This joint type, compliant with ISO 4633, allows for angular deflection (up to 15° in larger diameters) and axial movement, accommodating ground shifts without leakage . The joint's sealing mechanism relies on the gasket's compression as the spigot is pushed into the socket, creating a watertight connection that can withstand up to PN16 pressures. Key advantages include reduced installation time (50% faster than welded or flanged joints), lower labor costs, and ease of disassembly for maintenance. Push on joints are ideal for emergency repairs and trenchless installations, where access is limited. Material considerations include ductile iron grades (e.g., K9) for strength and gasket materials (NBR, EPDM) for chemical resistance . Installation best practices include proper alignment, lubrication of the gasket to reduce insertion force, and post installation leakage testing. In seismic zones, the joint's flexibility helps absorb ground vibrations, minimizing the risk of pipe failure. Recent innovations include self locking push on joints that prevent accidental disconnection under high thrust loads.