How to Wire a Potter VSR Flow Switch to a Bell

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The Potter model VSR-3.5 is a vane-type saddle flow switch with retard and SPDT contact(s), designed for use with 3.5-inch steel pipe.

Potter VSR-3.5, Vane-Type Waterflow Switch for 3.5-inch Steel Pipe, with Retard, SPDT Contact(s)

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How to Wire a Potter VSR-AT AutoTest Flow Switch