Push Button Test Valve

Hold the button in to relieve pressure under the piston. System pressure will force the piston down so the operator can observe motion. Erratic movement of the piston indicated contamination of piston and glass cylinder, requiring cleaning. Note: This test releases about 50ml of fuel which can be collected in a cup or directed to recovery systems.

Pressure Relief Feature

Incorporated in all Push Button models is a thermal expansion relief valve set at 300 psi to protect the gauge from excessive pressure if isolation valves have been closed.