This McAlpine mechanical soil pipe boss connector, in a grey finish, is designed for 4"/110mm soil pipes and accommodates a 1 1/4" waste pipe. It features a 57mm hole saw size and is supplied with a fixing tool. The mechanical design allows for easy installation without adhesives, creating a watertight seal for waste water and condensate discharge. Suitable for both pushfit and solvent weld waste pipes, it's a durable and reliable solution for various plumbing projects.