HIGH FLOW PRESSURE UNLOADER by GENERAL PUMPPA VB 85 160 and General YUW21235 white spring trapped pressure unloader valve. New design has reduced pressure loss and makes for easier gun operation YUW21235 Specifications: Spring Color: White Maximum Pressure: 2,200 PSI Max. Volume: 21. 0 GPM Adjustable pressure Forged brass body Rated Temperature: 195 F Inlet Ports (2): 1 2" FPT Discharge Port: 1 2 FPT Bypass Port: 1 2 FPT Weight: 40. 7 oz YUB21405 Specifications: Spring Color: Blue Maximum