The McAlpine A10AV-SV 75mm Water Seal Anti-Syphon (Silentrap) Adjustable Inlet Bottle Trap is a plumbing component used in sink and basin installations to prevent foul odors from escaping through the drain. This particular bottle trap features a silicone non-return valve which prevents water from flowing back up the drain and causing flooding. It also has a multifit outlet which means it can be connected to different types of waste pipe, making it versatile and easy to install. The adjustable inlet allows for flexibility in installation, as it can be adjusted to fit various pipe sizes and angles. The water seal in the trap prevents sewer gases from entering the room, ensuring a hygienic environment. Overall, the McAlpine A10AV-SV 75mm Water Seal Anti-Syphon (Silentrap) Adjustable Inlet Bottle Trap is a high-quality and reliable plumbing component that can help ensure the proper functioning of your sink or basin drain while also preventing unpleasant odors from escaping into your living space. ・ Available in 1¼" and 1½" sizes ・ 75mm Water Seal ・ Silicone Valve prevents foul odour or sewer gas entering the building if the water seal has evaporated which may occur due to lack of use through under occupancy ・ Multifit Compression Outlet suits all plastic, copper and lead pipe ・ Adjustable Inlet makes trap suitable for all domestic repair, maintenance and improvement work