How does a sand water filter work?
A sand water filter or consists of 3 main parts: a composite pressure vessel a sand water filter control valve (usually low voltage) graded beds of sand The water filters down through the sand water filter media, up through a riser tube in the centre of the composite pressure vessel and out through the sand filter control valve to service. Periodically, the sand filter will backwash, which changes the water flow through the sand filter. The water in the backwash cycle flows in from the inlet down the centre riser tube, up through the sand bed and out of the sand water filter control valve to drain. The next step in a sand filter regeneration cycle is rinse. The water in a rinse cycle of a sand filter flows as in service, down through the composite pressure vessel and sand filter media, up through the centre riser tube through the sand filter control valve and to drain. The sand filter then returns to its normal service position. Please note that the above relates only to the smaller si
