Vacuum Switch, 2.5″ HG Burner Control

by | Jul 31, 2026

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 Switch, 4.5″ HG Burner Control

by | Jul 31, 2026

This 8.712-393.0 Normally Open VACUUM SWITCH with 4.5″ 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 Switch, 1.5″ HG Burner Control

by | Jul 31, 2026

This 8.712-391.0 Normally Open VACUUM SWITCH with 1.5″ 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.