The perfect solution to smelly manholes. Function: By microorganisms, which are located in the biofilter material, which contaminated air is biodegradable. Our Biocartridges characterized by ease of use. Structure: • 1 Filtercassette with false floor and special filter material. • 2 Filter head. • 3 Mounting ring. • Dirt and grit from PE-HD. Advantages: • Shelf prevents compaction and removal of the filter material. • By the special filter head can freely run the water in the channel. • Patented mounting ring guarantees a perfect seal to the shaft edge and remains fixed even when the inspection the shaft head. • Minimal flow loss. • Suitable for all manholes according to DIN 4034 (DN 600-625 mm approx). ▪ Suitable for other sizes according to DIN 4034. • With special suspension and fits VIATOP - ACO - Hydrotech and Begu Covers. • Simple change of filter material by cassette exchange or supply of filter material to fill even. • No tools. • can be used for about 4-6 years. • 10 year warranty on plastic parts. • If desired, a combined biofilter filled with activated carbon and can, therefore, even for prolonged drought, a guaranteed effectiveness. Technical data: • diameter 600-630 mm • Durable Material: PE - HD (corrosion-resistant material). • Weight: 18 kg. • Installation length: 700 mm.