Studor Maxi-Filtra Practical Two-way Vent for External Drainage Systems The Studor Maxi-Filtra is a sturdy, active carbon vent designed specifically for outdoor applications to eliminate bad odours produced by the drainage system, and is ideal for use with septic tanks. Robust design means the Maxi-Filtra can be used externally, either vertically or horizontally, and can be installed in hard-to-reach places. The active carbon filter within the Studor Maxi-Filtra operates as a two-way vent, filtering air in both directions and absorbing the bad odours. The Studor Maxi-Filtra is packaged in a resilient exterior for longevity outside, together with an initial replaceable filter. The Studor Maxi-Filtra may be installed externally anywhere when the odour from existing vents present a problem, or when pipe vents are to be included in the drainage system of a new build: Septic tanks Grease separators Rain water tanks Sewage treatment plants Lifting equipment* Building drainage open vents* *in conjunction with AAVs of an appropriate airflow For best results, the Maxi-Filtra should always be installed in conjunction with an Air Admittance Valve within the drainage system. Also, we recommend that the filter should be replaced at least every two years – or when smells recur. Benefits and features of the Studor Maxi-Filtra: Saves money by eliminating the need for odour-reducing additives in septic tanks. Easy retrofit installation to solve existing problems. Simple push-fit connection to all brands of UK domestic soil pipe. Designed to resist extreme temperatures and deterioration. Low maintenance – just replace the carbon cartridge a minimum of every two years; the Maxi-Filtra cap simply lifts off. Produced by Studor, the only specialist manufacturer of drainage ventilation products, the Maxi-Filtra comes with a lifetime *****excluding the replaceable cartridge***