AR Mecline VRT3-250H Unloader Valve 3630 PSI 10.5 GPM Pressure Washer Bypass by | Jul 25, 2026The unloader must be rated equal to or above your pump’s output specifications. Max Flow (GPM) 10.5 GPM. Outlet / Bypass Port 3/8″ Female. Max Temperature 194°F (90°C). Ball Material Ceramic. Key Features.