The McAlpine WM15V is a plumbing trap designed for use with domestic appliances such as dishwashers and washing machines. It is an adjustable inlet, anti-syphon (Silentrap) 'P' trap, which means it is designed to prevent the backflow of wastewater from the pipework and prevent airlocks in the system, while also allowing for adjustment to ensure a perfect fit. The trap has a 75mm water seal to prevent foul odours from entering the room, and a 1.5" multifit outlet for easy connection to standard pipework. It also features a 135° swivel inlet connection, which allows the discharge pipe from the appliance to be connected at an angle that is convenient for installation. The adjustable inlet feature of the WM15V trap allows for adjustment in both the horizontal and vertical planes, making it easy to achieve a perfect fit with the appliance's discharge pipe. This feature ensures a watertight and secure connection, preventing any leaks or smells from escaping. The anti-syphon feature of the WM15V trap prevents the siphoning of water from the trap, which can lead to airlocks and the release of unpleasant odours. This feature ensures that the trap remains full of water, creating an effective barrier to prevent the backflow of wastewater. The WM15V is designed as a tubular swivel trap, meaning that it consists of a curved section of pipe that creates a water seal. This water seal prevents unpleasant smells from entering the room, as well as preventing the backflow of wastewater from the pipework. Overall, the McAlpine WM15V trap is a reliable and easy-to-install solution for ensuring a clean and efficient waste system for domestic appliances such as dishwashers and washing machines. Its adjustable inlet, anti-syphon feature, 135° swivel inlet connection, and 75mm water seal make it a versatile choice for a range of installation scenarios. 75mm Water Seal 1.5" Multifit Compression Outlet suits all plastic, copper and lead pipe Adjustable Inlet makes trap suitable for all domestic repair, maintenance and improvement work Can accept discharge from a washing or dishwashing machine Supplied with blank plug allowing trap to function as a normal sink trap until the domestic appliances are connected

It is designed and manufactured by McAlpine, a UK-based company that specializes in plumbing products.

Extended returns Orders placed after 29th October 2026 can be returned until 5th January 2027

Something not quite right? You have 21 days from the day you receive it, to send something back. When you purchase Debenhams Deliver+, you will have an extra 14 days on top of our standard 21-day window to initate a return.

Please note, we cannot offer refunds on fashion face masks, cosmetics, pierced jewellery, adult toys, and swimwear or lingerie if the hygiene seal is not in place or has been broken.

Items of footwear and/or clothing must be unworn and unwashed with the original labels attached. Also, footwear must be tried on indoors. Items of homeware including bedlinen, mattresses, and toppers, and pillows must be unused and in their original unopened packaging. This does not affect your statutory rights.

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