The Plasson Metric to Imperial Slip Coupling 7418 (25mm x 3/4in) is a dedicated transition compression fitting engineered to join modern 25mm metric MDPE (Medium Density Polyethylene) water pipe directly to existing 3/4-inch legacy imperial pipe (such as old Class C/D black alkathene or LDPE). It is widely utilized by utility contractors, plumbers, and agricultural workers during repair works, service upgrades, or mains connections where modern metric networks must integrate seamlessly with legacy imperial infrastructure without requiring separate conversion sets.
 
Manufactured from high-grade virgin polypropylene copolymer, this coupling offers superior impact strength, environmental stress resistance, and complete immunity to rust and electrochemical corrosion. Designed as a "Black to Blue" transition fitting, it incorporates specialized internal split rings and captive O-ring seals on the imperial side tailored to compensate for the outer diameter and wall thickness variations of 3/4-inch pipe, while maintaining standard 25mm metric compression mechanics on the opposing end.
 
Engineered for quick, straightforward installation on site, the slip design allows the fitting to slide cleanly onto prepared pipe ends and tighten down securely using hand torque or a standard wrench, eliminating hot works or solvent welding. Fully WRAS-approved for wholesome potable water and rated for high working pressures up to 16 bar (PN16), this trade-quality transition coupling ensures a long-term, leak-free connection across subterranean and surface-mounted water infrastructure.