FIELD: filters with heavy filter media for water purification; applicable in water-supply and sewer systems in public utilities at industrial and agricultural enterprises. SUBSTANCE: automatic siphon filtering device has pressure filter with heavy filter media, washing water tank, siphon whose arising branch serves as pipeline supplying initial water to filter and has a break enclosed in airtight chamber. It is communicated with regulating receiving tank through hydroseal with floating shutoff valve. EFFECT: simplified design, reduced overall dimensions and higher efficiency of operation. 4 cl, 1 dwg
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