Flow Switch AP500 Vertical Mount for Hot Water Pressure Washers – 3500 PSI by | Jul 22, 2026Flow Switch, AP500. The 8.712-244.0 Legacy AP500 vertical mount flow switch is designed for use on hot water pressure washers. 3/8″ FPT Inlet and Outlet. Hot water pressure washers. Vertical mount. 1 Amp switch.
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