The Plasson Compression Fit Coupler is perfectly suited for connecting water mains pipes and any water supply pipes in infrastructure, agriculture and horticulture. Used to connect both MDPE and MDPE irrigation pipes, a pipe liner is required when using this fitting with MDPE piping. Made from virgin Polypropylene for immense impact strength and stress resistance. Extremely robust and strong fitting, it is perfectly suited for outdoor use in direct sunlight and is also frost resistant. The coupler comes with a captive O-ring to create a perfectly water tight seal, making it easy and fast to install by simply tightening the grip once secured to the pipe. Plass4 connects metric polyethylene to other pipe materials such as imperial polyethylene (alkathene), copper (table x & Y), lead, galvanised steel, PVCu & poly-york. Plass4 is easy to use with no specialist tools needed to complete the joint. WRAS Approved Product - will be accepted by water companies as suitable for drinking water systems. Connects MDPE pipe to all metal pipe: imperial & metric, copper & steel. Allows for an immediate repair. Easy to use & no specialist tools needed. Long service life - designed to last in use for over 50 years. Due to its versatility, only a few fitting sizes are needed to cover all pipes from 15mm to 50mm. PN16 pressure rated.