The McAlpine T21A is a caulking ferrule that is designed to provide a watertight seal between a 2-inch waste pipe and a 1 1/2-inch soil pipe. The T21A ferrule is part of the Multifit range of plumbing fittings and pipes made by McAlpine. The T21A caulking ferrule features a flexible rubber construction, which allows it to be compressed and fitted into the end of a 2-inch waste pipe. The ferrule is then pushed onto the 1 1/2-inch soil pipe and sealed using a suitable caulk or sealant to provide a watertight seal. The T21A caulking ferrule is designed to be used with both plastic and copper pipes, and is suitable for use in a range of plumbing applications, including domestic and commercial installations. It's important to note that the T21A caulking ferrule is designed specifically for use with the McAlpine Multifit system, and may not be compatible with other types of plumbing systems or fittings. Additionally, it's important to ensure that the T21A caulking ferrule is used in accordance with any local plumbing codes and regulations to ensure proper installation and safety. ・ Available in 1¼", 1½", and 2" sizes ・ Multifit Fittings suit all plastic waste pipes to BS EN 1451-1:2017 and BS EN 1329-1:2020 and copper pipe and lead pipe