Industrial Sand Filter Capacity 500m3 Per Hr Sand Filter, or Sand Water Filter, makes use of sand to filter water. The water to be purified slowly sinks through the sand of the sand filter, leaving the dirt particles from the water behind in the fine pores of the sand. This filter technology is especially suitable for pre-filtration of disinfection equipment, preparation for micro- and ultra-filtration, recirculation systems, rinse water processes, irrigation systems, basin water filtration and ground water cleaning.