| 摘要 |
PROBLEM TO BE SOLVED: To provide a piping structure of a bathtub which can reduce a cost with good appearance without contaminating the inside of the bathtub. SOLUTION: The piping structure of the bathtub comprises one circulation port body 2 having a suction port 2a and a discharge port 2b and mounted at the bathtub 1, and a cleaner 4 having a circulation passage 5 connected at one end side to the port 2a of the body 2 and at another end to the port 2b. In this structure, circulating pipings 12, 13 of a water heater 11 are connected to the passage 5 of the cleaner 4. A check valve 9 is provided at the upstream side of the connecting site of the pipes 12, 13 of the heater 11 in the passage 5 of the cleaner 4.
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