NICKEL-FREE WATER SUPPLY SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a nickel-free water supply system which can greatly suppress the leaching and elution of a specific metal such as nickel into passed water, even if the surface of the specific metal such as nickel exists as the internal surface of a water passage in a water passing environment.

SOLUTION: In this nickel-free water supply system, the nickel-plated internal surface is formed along the water passage 11a of a pipe 11. In at least a part of the internal surface of the pipe 11 or a part which is connected to the internal surface on the water passage 11a, a base metal which is composed of metal such as zinc having a higher level of ionization tendency than that of nickel is integrally provided as a plated layer for a drain cock 18a of a piece 18.

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