UK Suppliers Of Filter Bed Wall Units

FP McCann offers a specialist design and building service for circular biological filter walls. The inherent flexibility of this well-proven system allows us to accommodate all ancillary requirements. FP McCann's filter beds provide low whole life costs, due to the low energy and low maintenance required by the system. Offering many advantages over ASP, Baff and Saff Treatment processes, the system uses zero energy, zero chemicals and has a very low carbon footprint. Due to daily and seasonal temperature fluctuations, traditional brick, cast in-situ concrete and stiffly joined, freestanding filter bed structures have high levels of failure associated with the development of excessive circumferential stresses induced in the wall. During successive cycles of expansion and contraction, the passive pressures at wall/filter medium interface increase with time in a racketing manner. This failure normally occurs suddenly, although it may take years to develop and even with thorough and regular visual inspection, it is difficult to predict.