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2 to 7 psi Adjustable Fuel Pressure Warning Switch

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This low pressure warning switch is perfect for turning on a light (sold separately) to indicate a loss of fuel pressure. The pressure is easily adjustable from 2 to 7 psi. Installs in any 1/8NPT port. Single terminal grounding type switch works with any of our warning lights or any other two-wire (non-grounding) warning light.

When the pressure is above the set point, the switch is open (circuit interrupted, warning light off)
When the pressure drops below the set point, the switch is closed (circuit completed, warning light on)

Note: This switch depends on an electrical ground to complete the circuit. When installed in a rubber fuel line, it will require a ground wire from the switch body to a ground on the chassis.

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2 to 7 psi Adjustable Fuel Pressure Warning Switch


Perfect fuel pressure control switch to shut the electric fuel pump(s) off when the motor is idling. I placed the switch in the relay ground wire circuit, where it disconnects the electric power from the 'contact on' mains. I adjusted the 'power off' level to 4 psi. This will protect the float needle and seat in the fuel bowl against extreme wear because of high fuel pressure when idling. Works perfect and protects against vapor lock too






Part worked perfect. Needed it to work as a cutoff when my fuel pump reached 7psi and it works great!!


Cynthiana, Kentucky


Great switch


Just installed on an aux tank transfer system, works as expected, had to make some initial adjustments , but they were easy as the adjusting Allen screw is easy to get to for setting pressure. Did have to go back and add Teflon tape because it leaked around the threads, but it grounds just fine.


Washington, United States


2 to 7 psi Adjustable Fuel Pressure Warning Switch

4.7 3