This McAlpine boss connector is a high-quality product designed to provide a reliable connection between a 1¼" waste pipe and a soil stack or drain pipe. It is suitable for carrying sanitary waste from domestic, commercial, and industrial installations. The connector features a two-piece design for easy installation and a rubber seal that provides a watertight and airtight seal, preventing leaks or odors. It allows condensate discharge from a condensing boiler to be discharged via a soil or rainwater pipe and conforms to BS 6798:2014 and Building Regulations Approved Document H. Available in Black or Grey.