Plasson coupler for joining different sized MDPE water supply pipes, simply insert pipe and hand tighten The Plasson range of fittings provide a reliable and durable way of jointing water supply pipes, requiring no special tools to use effectively. WRAS Approved Product - will be accepted by water companies as suitable for drinking water systems. Simple to use - insert pipe to the stop and hand tighten. Flexible solution - connects different pipe types through the use of adaptors. Long service life -designed to last in use for over 50 years. Made of virgin Polypropylene - incredibly durable, unlikely ever to break. Captive 'O' ring - ensuring ultimate sealing performance. PN16 pressure rated