28870 ⎘
Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container; Upward filtration the filtering material being supported by pervious surfaces
Apparatus and method for removing impurities from water or wastewater
#2Floating filter media filtration system with backwash
#3Water filtration device and method for re-circulating filtered water in decorative waterways
#4Restrictive up flow media filter with servicing system