The McAlpine R14 ¾" In-Line Non-Return Valve is a plumbing component that is used to prevent the backflow of water or other fluids in a plumbing system. Here are some of its features: Size: The valve has a ¾" (19mm) inlet and outlet. Material: The valve is made of high-quality polypropylene material that is durable and resistant to corrosion. Non-return design: The non-return design of the valve allows for the flow of water or other fluids in one direction only, which prevents backflow and contamination of the plumbing system. In-line installation: The valve is designed to be installed in-line with the plumbing system, which allows for easy integration into the existing pipework. Easy to install: The valve is easy to install and can be used in both residential and commercial plumbing systems. Complies with building regulations: The McAlpine R14 ¾" In-Line Non-Return Valve complies with UK building regulations and is suitable for use in new builds, renovations, and repairs. Overall, the McAlpine R14 ¾" In-Line Non-Return Valve is a reliable and efficient plumbing component that is designed to prevent backflow and contamination in a plumbing system. It is made of high-quality polypropylene material and is easy to install, making it a popular choice for plumbers and DIY enthusiasts alike. ・ For information on Wasteflow Products click here ・ For WC Overflow Kits click here