| 摘要 |
PROBLEM TO BE SOLVED: To prevent air from flowing backward from a drain pipe to a purified water pipe for bathwater even if there is a level difference between installation heights of a bathtub and a device when bathwater in the purified bathwater pipe is discharged to the outside of the pipe line. SOLUTION: Purifying instruments such as a hair catcher 5, a main pump 6, a filter tank 8, a heater 9, etc., are respectively connected in series through connection pipes between a suction pipe 3 sucking bathwater in a bathtub and a discharge pipe 10 discharging again purified bathwater to the bathtub to form a bathwater purifying pipe line, and a check valve 19 is disposed in a drain pipe 17 which is connected to the bathwater purified pipe line through a changeover valve 18.
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