Elect. Pump Safety Switc

The Holley Electric Pump Safety Switch (Model 12-810) is a pressure-activated safety device designed to protect fuel pump systems by monitoring pressure thresholds in performance and street-rod applications. This switch activates or deactivates the fuel pump circuit based on engine pressure conditions, preventing pump operation during low-pressure or idle scenarios where fuel delivery should be controlled or suspended.

The switch features a 5 PSI minimum pressure rating and connects via a 1/8-inch NPT male threaded port, a standard interface on most modern fuel system manifolds and distribution blocks. The 5 PSI threshold is calibrated to engage the fuel pump circuit once engine oil or fuel pressure reaches safe operating levels, while remaining inactive at cranking or no-load conditions. This design protects the pump from unnecessary cycling and extends electrical system life by reducing parasitic draw on the battery during non-running periods. The compact package weighs only 0.14 pounds and fits standard underhood mounting locations without requiring exotic adapters or modifications.

This switch is intended for street rods, restorations, and performance fuel systems where pressure-triggered pump control is preferred over traditional relay setups. It is commonly installed in carbureted or fuel-injected hot rods, vintage truck builds, and custom applications requiring intelligent pump management. The Holley 12-810 integrates directly into fuel pump wiring circuits and works with both 12-volt and high-output alternator systems typical of modern performance builds.

Holley is recognized in the aftermarket fuel system and performance automotive industry for precision-engineered components that meet the demands of competition and street-driven vehicles. The 12-810 switch reflects that engineering standard and is compatible with Holley fuel pump controllers, EFI systems, and third-party pump management harnesses that reference 1/8 NPT ports and pressure-switch logic.