Save service time by using a vacuum valve assembly with your vacuum pump! Valve assemblies give the service technician maximum control during evacuation and recharging. Installed directly to the vacuum pump, they connect the pump, manifold and thermistor gauge, providing one central control point for evacuation and charging. Saves time – no need to connect / disconnect hoses which allows air to enter the system being serviced and makes service time quick and easy. This High Vacuum Valve Assembly For Use with a Thermistor Gauge is an essential tool. 1/2" FFL Coupler X 3/8" Male Flare X 1/4" Male Flare