McAlpine 1 1/2" Anti-Syphon Bottle Trap

"""75mm Water Seal Anti-Syphon (Silentrap) Bottle Trap with Multifit Outlet. 75mm Water Seal Anti-Syphon (Silentrap) Adjustable Inlet Bottle Trap with Multifit Outlet 1¼”. Fits in minutes. When emptying the sink, the valve opens up to let air in. Sinks will empty faster, and it provides a snug fit. It is a perfect solution for stopping smells and gurgles in your bathroom if your plumbing has negative pressure. Available in 1¼” and 1½” sizes 75mm Water Seal Multifit Compression Outlet suits all plastic, copper and lead pipes Anti-Syphon Valve neutralises negative syphonic pressure and eliminates gurgling Manufactured in polypropylene Conforms to BS EN 274-1:2002"""