The pre-filter mat made of PES is at least 13 mm thick, progressively needled with step filter and additional node stiffening. Weight per unit area approx. 350 g/m².
The prefilter mat is available in prefabricated sizes for e.g. soakaways or drainage channels. Whole rolls are approx. 5 m wide and approx. 48 m long.
Areas of application: soakaway shafts, stormwater treatment, technical filters, retention, substrate channel, drainage channel, filter basins, infiltration troughs, infiltration basins.