Autometer 5412 Liquid Filled Pro-Comp 2-5/8" Mechanical 0-100 PSI Fuel Pressure Gauge

Venting liquid filled gauges

Autometer's liquid filled gauges have a vent screw on top of the gauge's housing. Internal pressure can change because of altitude, barometric pressure, or temperature. This causes an inaccurate or off zero reading on more sensitive low pressure gauges. To prevent this, it's recommended that the gauge be vented. With the vent screw in the upright position, turn the screw two turns counterclockwise to equalize the gauge case pressure. This allows the gauge to breathe and self adjust. Then re-tighten the screw.

Do NOT over tighten the vent screw! Over tightening the screw WILL damage the threads of the gauge's housing.

The back of Autometer fuel pressure gauges have a -4 male fitting. Mechanical fuel pressure gauges must be mounted outside of the vehicle using a gauge mounting cup, unless you purchase the 5282 isolation kit (sold separately).

Only Autometer liquid filled and Ultra-Nite gauges are water resistant!

You also need to purchase -4 fittings and lines to go from this fuel gauge to your fuel lines or fuel rails and optionally the 5282 isolator (sold separately) if you want to mount this gauge in your dash.