How does a sand-anthracite filter work?
A sand anthracite filter or multi-media filter consists of 3 main parts: • a composite pressure vessel • a sand-anthracite filter control valve (usually low voltage) • graded beds of sand and anthracite The water filters down through the sand-anthracite filter media, up through a riser tube in the centre of the composite pressure vessel and out through the sand-anthracite filter control valve to service. Periodically, the sand-anthracite filter will backwash, which changes the water flow through the sand-anthracite filter. The water in the backwash cycle flows in from the inlet, down the centre riser tube, up through the sand and anthracite bed, and out of the control valve to drain. The next step in a sand-anthracite filter regeneration cycle is rinse. The water in a rinse cycle of a sand-anthracite filter flows as in service, down through the composite pressure vessel and sand-anthracite filter media and up through the centre riser tube, through the sand-anthracite filter control val
