The McAlpine VP2 Ventapipe 25 Air Admittance Valve is a plumbing device designed to allow air into the drainage system while preventing foul odors from escaping. This valve features a 1½" universal outlet, compatible with various pipe sizes and materials, making it suitable for waste pipes from sinks, basins, baths, and other fixtures. Manufactured by McAlpine, a trusted name in plumbing, it meets high standards of quality and reliability. The VP2 Ventapipe 25 offers an efficient alternative to anti-syphon systems and can be used to reseal traps and ventilate waste pipe systems, addressing issues like noisy discharge or loss of trap seal. It has an A1 rating and an air flow capacity of 3 l/s. For comprehensive information on Air Admittance Valves, please refer to the details provided below. Features: 1½" Universal Outlet, A1 rated, Air flow capacity of 3 l/s.