| 摘要 |
PROBLEM TO BE SOLVED: To provide a circulation metal fitting for a nonpolar bathtub which can perform discharge of warm water to the bathtub from openings at the lower parts of both left side and right side of the metal fitting, prevent a difference in boiling temperature, and which is free from a danger of burn in reheating while sitting in the bathtub. SOLUTION: An opening for suction and an opening for discharge are installed in a main body of a circulation opening. Warm water paths 15, 16 connecting the opening for suction and the opening for discharge are installed inside of the main body of the circulation opening. These paths are provided with a check valve allowing inflow of the warm water from the opening for suction into the warm water path, a check valve allowing outflow of the warm water from the warm water path into the opening for discharge in a front side of the opening for discharge, a check valve allowing inflow of the warm water from the opening for suction into the warm water path, and a check valve allowing outflow of the warm water from the warm water path into the opening for discharge. Both the openings for discharge communicate with each other by a communicating path at the lower side of each check valve.
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