FIELD: fluid-tight joining of draining hose of tank with receiving pipe of underground reservoir at draining oil products. SUBSTANCE: coupling includes housing, lock nut, device for clamping draining branch pipe. Said device is in the form of yoke with fixation handle, one rotation axle and forcing bracket. Rotation axle has head with enlarged pressure area and cylindrical member for orienting yoke. Bracket has dent at one side. Coupling is provided with adaptor. EFFECT: enhanced reliability of coupling. 2 dwg
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