FIELD: domestic equipment mounted on passenger aircraft. SUBSTANCE: system has WC bowl 1 with discharge valve 2, collecting tank 3 connected with WC bowl 1 by means of drain pipe line 4, centrifugal compressor 5 for discharging air from collecting tank 3, control equipment 6 and air ducts 7, 8 and 9 connecting collecting tank 3 with compressor 5 and atmosphere with compressor 5 and collecting tank 3 which are provided with adjusting valves 10 and 11 and bypass pipe 12. One end of pipe 12 is received by air duct 9 which brings collecting tank 3 in communication with atmosphere: it is bent towards side opposite to direction of motion of air flow. EFFECT: increased service life of system through avoidance of windmilling of compressor during operation of system in flight. 1 dwg
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