The FloPlast Air Admittance Valve is a white 50mm fitting designed for use in sanitary pipework systems. It allows for the free entry of air while preventing the escape of foul gases into buildings. When installed according to BS EN 12056:2000 standards, it helps prevent water loss from trap seals due to induced siphonage and serves as an early warning indicator for potential drainage blockages. The valve complies with Approved Document H of the Building Regulations and requires ventilation and access during installation. Features: - Allows free entry of air into sanitary pipework systems - Prevents escape of foul gases into buildings - Helps maintain water seal integrity and prevents water loss through siphonage - Early warning indicator for potential drainage blockages Benefits: - Ensures proper functioning of sanitary systems by maintaining air pressure balance - Promotes hygiene and odor control within buildings - Provides a reliable and efficient solution for managing air flow in plumbing systems. Kitemarked to BS EN 12380 - Licence No. KM512474. CE marked to BS EN 12380 Attestation Level 4 With the use of the compression socket fits directly to 32mm ABS, polypropylene and MUPVC UK designated pipe work. Air admittance valve may also be used as a secondary rodding Point to remove blockages. Easy to install.