STUDOR Air Admittance Valves(AAVs)

The Maxi-Filtra is an active carbon filter designed to eliminate bad odours produced by the drainage system. For use externally, it operates as a 2-way vent, filtering air in both directions. Particularly for use with septic tanks, the Maxi-Filtra may also be installed on open vents - either where the open vents already exist or for new-builds where regulations insist on their inclusion within the building’s drainage system. For best results, the ® Maxi-Filtra should be installed in conjunction with Air Admittance Valves from the ® System.

The Installation

The ® Maxi-Filtra may be installed vertically or horizontally in an accessible external location. No specialist installation is required – the Maxi-Filtra is commonly installed with a push-fit connector. The cap simply lifts off to enable easy access for the carbon filter to be replaced a minimum of two-yearly. In installations with high odour saturation the carbon filter should be replaced more regularly when odour becomes noticeable.

The Accessories

The ® Maxi-Filtra is supplied with one carbon filter and the connector as standard. The Maxi-Filtra fits 90mm without the connector and 75mm/110mm with connector. The replaceable carbon filter should be changed regularly.

The Aluminium Cover provides protection to the Maxi- Filtra when it is installed outside the open air. This provides insulation again extreme temperatures (-20°C to +60°C) and protection from animal/birds and the environment, i.e. inclement weather and the sun's ultra-violet rays.