Kuterlite Brass Compression Fittings enables copper tube, polyethylene pipe from 6-108mm and carbon steel up to 28mm to be joined by mechanical means.The Kuterlite Compression Fitting contains an olive which is compressed to the tube or pipe when the nut is tightened. Kuterlite Compression Fittings are manufactured to BS EN 1254 part 2, WRAS approved and hold a 25 year guarantee against manufacturing defects