Brass compression fitting for polyethylene and multilayer pipes. It allows joining three cross-linked polyethylene and multilayer pipes, two on the main way and a third one on the lateral branch. It is composed by ten pieces: a body tee shaped, three inserts with their corresponding sealing rings, three clamping rings and three nuts. It secures the entire assembly when tightening the nut around the clamp ring. This product is available in several diameters starting from 16mm up to 25mm.