FIELD: attachments for sealing up reservoirs. SUBSTANCE: apparatus for draining liquid has draining opening to be sealed, corking device and washer placed in draining opening of reservoir. Washer has at least three openings. U-shaped small tube is inserted into opening of washer; one leg of said tube is longer than its another leg and it is introduced into liquid. Small tube has larger diameter in zone of fixing it in opening of washer. EFFECT: simplified design, enhanced operational comfortability for user. 4 cl, 4 dwg
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