FIELD: water cleaning technology. SUBSTANCE: filter flushing device is made in the form of a bank of pipes vertically installed over the entire charging volume; positioned on external surface of pipes are arc-shaped tees with holes for passage of flushing water located on concave side of tees; and system for inlet of impure water is made as a converging tube placed under layer of floating granular charge. EFFECT: improved quality of water cleaning. 3 dwg
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