The McAlpine R28-NRV Non-Return Valve is a plumbing accessory designed to prevent the backflow of water or other fluids in a pipeline. It features 19/23mm universal connections for straightforward installation into various plumbing setups. Constructed from high-quality materials, this valve offers excellent durability and resistance to corrosion and wear. Its non-return mechanism ensures unidirectional fluid flow, safeguarding potable water from contamination and protecting plumbing fixtures from potential damage. This makes it an essential part of any plumbing system, especially in scenarios involving wastewater or other contaminated fluids. Manufacturer: McAlpine.