Ventapipe 100 Internal/External Air Admittance Valve. The VP100E Ventapipe is a versatile, innovative valve designed for both internal and external use. It features a dual-fit synthetic rubber finger seal outlet compatible with 4?/110mm soil pipes, providing a reliable and easy push-fit installation. The valve effectively prevents foul odours caused by negative pressures in drainage systems. Key Features: Fits 4?/110mm soil pipe. Dual-fit synthetic rubber finger seal outlet for secure connection. A1 acoustic rating for quiet operation. Suitable for installation above or below the flood level of connecting appliances. High airflow capacity of 40 litres per second. Incorporates a stainless steel mesh to protect the air intake. Complies with BS EN 12380:2002 standards. Available in Black, Grey, and White to suit various installations. Recommended by McAlpine for internal installation within buildings. Operates effectively in temperatures ranging from -20°C to +60°C.