Part Number: 8.712-392.0
Cross Reference Part Number(s): 413032, 728855, 8-25100007, 87123920
This 8.712-392.0 Normally Open VACUUM SWITCH with 2.5″ HG closes when the pump vacuum begins to draw water, allowing for burner ignition, then opens when the vacuum is broken; either due to pump shutdown or an empty water tank. Vacuum switches are used by such pressure washer manufacturers as Aaladin for burner control.