The SPEL Filter is a cartridge filter system that incorporates an upflow treatment process, through a spiral wrapped media configuration that maximises surface treatment area. Flow through the filter cartridges utilises a self-regulating siphon which results in a low maintenance and high performance stormwater treatment. The automatic backwash at the end of each storm event further lengthens the lifespan of the filter.
Hydraulic pressure forces water through the filter media — causing a constant velocity throughout the filter area realising a consistent media contact time and therefore treatment.
Upon completion of a treatment cycle, the filter backwashes and effectively dislodges particulates from the filtration layers. This re-establishes filter media interstitial porosity. The dislodged particles then accumulate away from the filter media allowing easy removal during maintenance.
The SPELFilter range incorporates patented designs which use no moving parts, and in turn generates a true filter media regeneration effect.
The product has been approved by Auckland Council for Private and Public developments (excluding arterial / collector roads).