• Available in 1¼" (32mm) and 1½" (40mm) sizes • 75mm Water Seal • Multifit Compression Outlet suits all plastic, copper and lead pipe • Anti-Syphon Valve neutralises negative syphonic pressure and eliminates gurgling • Manufactured in polypropylene • Conforms to BS EN 274-1:2002 32mm Anti-Syphon (Silterap) Bottle Trap with 75mm Water Seal and Multifit Outlet