This product is made to be installed with 40mm pipe or fittings. If your pipe or existing fittings measure 43mm then this product is not campatible and you will require 43mm solvent weld fittings This listing is for a Pack of 1 40mm pushfit coupling contain ring seal at both ends. Pushfit waste pipe coupling Push fit waste pipe couplers are made to connect two 40mm pushfit pipes together. Each end has its own O-Ring to accept a push fit pipe.