This redox flow battery piping, which is provided between a battery element and a tank for storing an electrolytic liquid and through which the electrolytic liquid circulates, includes a meandering part which has: a plurality of parallel sections that are arranged in parallel; and a plurality of bending sections that connect the parallel sections adjacent to each other, and in which the parallel sections and the bending sections are alternately and continuously formed so as to be integral, wherein when D represents the outer diameter and X represents the center-to-center distance of adjacent parallel sections, the ratio between the center-to-center distance X and the outer diameter D satisfies 1.2-2.5.
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