McAlpine VP1 Ventapipe 25 Air Admittance Valve with 1.5" BSP thread on outlet

The McAlpine VP1 Ventapipe 25 Air Admittance Valve is a plumbing fitting that is designed to provide a one-way air admittance valve for a drainage system. It features a 1½" BSP threaded outlet and is suitable for use in applications where a mechanical vent pipe cannot be installed. The Ventapipe 25 is made from high-quality materials and is designed to meet all relevant plumbing standards. It can be installed in a wide range of applications