McAlpine A10AV Anti-Syphon Adjustable Inlet Bottle Trap. This bottle trap is an essential element of the basin's plumbing that keeps the bathroom hygienic and odour-free. The adjustable inlet makes the trap suitable for all domestic repair, maintenance and improvement work. It features an anti-syphon valve that neutralises negative symphonic pressure and eliminates gurgling. The trap is designed for use with a wash basin or sink. It features a 75mm water seal and an adjustable inlet, allowing it to be easily fitted to a variety of waste pipe sizes. The trap also includes a 1" multifit outlet, making it compatible with a wide range of plumbing systems. Bottle traps are commonly used in plumbing to prevent unpleasant odours and gases from entering a building through the drainage system. The trap works by holding a small amount of water in the trap's curved section, creating a barrier that prevents gases from passing through. The trapped water also helps to prevent the buildup of debris and blockages in the drain. The McAlpine A10AV is a high-quality bottle trap that is easy to install and offers reliable performance. Its adjustable inlet and multifit outlet make it a versatile choice for a range of plumbing applications. Available in 1" and 1" sizes. 75mm Water Seal. Multifit Compression Outlet suits all plastic, copper and lead pipe. Adjustable Inlet makes trap suitable for all domestic repair, maintenance and improvement work. Anti-Syphon Valve neutralises negative syphonic pressure and eliminates gurgling. Manufactured in polypropylene. Conforms to BS EN 274-1:2002.