This advanced Air Admittance Valve (AAV) protects the trap seals in the drainage system by allowing the intake of air, so a soil pipe can maintain the right level of pressure within the drainage system.

The Maxi-Vent is used in the following types of drainage venting applications and is the universal solution for venting the soil stack in any building:

Low rise residential building (3-4 floors): Used on its own.

Building up to 10 floors: Used in conjunction with the Mini-Vent.

Above 10 floors: Used as part of the P.A.P.A. System.

The Maxi-Vent eliminates roof penetrations and can be used with the Mini-Vent to vent an entire building without the need for passive vents pipes. It is resistant to extreme temperatures and, subject to being used with the insulating cap, its performance is guaranteed from -40°C to +60°C (far exceeding the requirement of EN12380 for the AI rating (which is “only” from -20°C)).

As the Maxi-Vent is very easy to fit and it will decrease the amount of work and piping, you no longer need to penetrate the roof of a property. It is favoured in residential homes, flats and commercial buildings of any height and its benefits lead to both cost and time savings.

The Maxi-Vent is discreet – it can be installed in the attic area, or even below the flood level of the highest connected branch. It may also be installed outside the building when used in conjunction with the aluminium cover and polystyrene cap. The aluminium cover may be painted to blend with the surroundings.

As the Maxi-Vent prevents the release of foul odours, by using it for an outside installation on vent pipes protruding into areas such as roof terraces, it allows these areas to become an extension of the living space.

As it saves many metres of pipework and eliminates external penetrations, thereby minimising thermal heat loss, the Maxi-Vent also has sustainability advantages and environmental benefits too.

Capacity: 32 litres/second at -250 Pa (10 Pa = 1mm water gauge)

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