Plast Compression Fittings Are Suitable For Use With The Whole Range Hd Polyethylene Pipe. Outer Dimensions Manufactured To Iso Standards; From 16Mm – 110Mm. The Perfect Seal; Achieved By The Rubber O-Ring; Ensure Complete Water Tightness Whether The Pipe Is Bent Or Straight. It Works Well In High Pressure Applications.The Resistance Of These 16 Bar. Fittings To Pull-Out Exceeds The Requirements Of All Standards. One Side Universal. Suitable For Galvanised; Pvc (Imperial & Metric); Hdpe And Copper.