The McAlpine T23 is a blank cap fitting that is designed to seal off the end of a pipe or fitting. The T23 blank cap is part of the BSP range of plumbing fittings and pipes made by McAlpine. The T23 blank cap features a BSP thread on the inside of the cap, which allows it to be screwed onto a pipe or fitting with a corresponding BSP thread. The cap also features a nut, which can be tightened to provide a secure and watertight seal. The T23 blank cap is made of durable plastic, which is lightweight and corrosion-resistant, and is suitable for use in a range of plumbing applications, including domestic and commercial installations. It's important to note that the T23 blank cap is designed specifically for use with the McAlpine BSP system, and may not be compatible with other types of plumbing systems or fittings. Additionally, it's important to ensure that the T23 blank cap is used in accordance with any local plumbing codes and regulations to ensure proper installation and safety. ・ Available in 1¼", 1½", and 2" sizes