This product is made to be installed with 43mm (known as 1 1/2 inch solvent weld) and 36mm (known as 1 1/4 inch solvent weld) pipe or fittings. If your pipe or existing fittings measure 40mm and 32mm, or has PP printed on it, then this product is not compatible and you will require 40mm and 32mm pushfit or compression fittings This listing is for a Pack of 1 Solvent weld reducer designed to fit into a larger solvent weld fitting and then accept a smaller solvent weld pipe Solvent weld fittings are secured using solvent weld cement for a permanent and strong installation Black Solvent Weld Waste Pipe Fitting