• Four Port Charging Style Emergency Relay Valve
• These valves include a Ratio Feature
• DO NOT use on converter dollies lift axles or trailer turn-able axles
• The preferred application is controlling tandem axles
• Supply Port: 3/8"
• Control Port: 3/8"
• Reservoir Port: 3/4"
• Delivery Ports(4)(NPT): 3/8"
• SAE J1860 Tag: RE045
• Nominal Crack Pressure: 4.5 PSI