
The vent knob should be closed prior to pressurizing the system by turning the knob away from the pump housing. The Vernier knob can be used to increase or decrease the system at a more controlled rate. For fast relieve of the pressure, move the pressure/vacuum pin to the opposite direction. Pressure/Vacuum Selector The pump can be used to generate pressure or vacuum depending on the position of the pin located in the pressure/vacuum switch. Press the pin on the side of the pump housing accordin