The Kuterlite range of compression fittings comprises are suitable for a broad spectrum of applications across the domestic and commercial sectors. Kuterlite is a quick, easy to use heat free system, and excellent for repairs, and in applications where ongoing maintenance is envisaged. K600 & K900-PRO fittings are compatible with copper tube, carbon and stainless steel tubes and PEX pipe (up to 28mm). The mechanical nature of Kuterlite’s joints is well proven technology that is extremely robust and resilient. Kuterlite. Kuterlite fittings belongs to connection technology product from Aalberts integrated piping systems.