Wavin 4S304W OsmaS ABS Air Admittance Valve 110 mm White

The Wavin 4S304W OsmaS ABS air admittance valve (AAV) is a 110 mm valve for above-ground soil and waste drainage. It admits air when the drainage system is under reduced pressure, which helps keep water seals in appliance traps from being siphoned away, and it closes under positive pressure to stop foul air escaping into the building.

It suits plumbers and installers working on domestic dwellings and multi-storey buildings where a vented stack is impractical, such as loft conversions, bathroom refits and new-build sanitary pipework. The body is ABS with integral protection screens and a synthetic rubber diaphragm and connector, so it can be fitted without penetrating the roof covering.

Key Features

• 110 mm air admittance valve for above-ground drainage
• ABS body with integrally moulded protection screens
• Synthetic rubber diaphragm and connector
• Push-fits into 110 mm pipe and over 75 mm pipe
• Connector removed: solvent-weld to 82 mm or 90 mm pipe
• Designated AI to BS EN 12380:2002
• Suitable for fitting below the flood level of connected appliances
• Operating air temperature between -20°C and 60°C

Benefits

• Prevents trap seals being drawn, reducing the risk of foul air entering the building
• Closes under positive pressure to stop foul air being released into the building
• No need to penetrate the roof covering
• Quick push-fit installation with the supplied connector
• Durable ABS and rubber construction with a service life matching the drainage system
• Repeated opening and closing does not affect sealing or operation
• Recyclable materials

Technical Specifications

• MPN: 4S304W
• Nominal Size: 110 mm
• Body Material: ABS
• Connection: Push-fit 110 mm pipe and 75 mm pipe; solvent-weld 82 mm or 90 mm pipe without connector
• Classification: AI to BS EN 12380:2002
• Air Temperature Range: -20°C to 60°C
• Airflow (110 mm pipe): 32.2 litres per second
• Maximum Stack Height: 45 metres or 10 storeys
• Gross Weight: 0.354 kg

What’s in the Box?

1 x Wavin OsmaS ABS air admittance valve 110 mm (4S304W)