Newly introduced Mecline VRT3 Unloader is an updated version of the Arrow Line VRT unloader with a stronger valve body with less porosity. The pressure adjustment handle was redesigned for easier operation at all pressure levels. The unloader valve diverts water flow into bypass when the trigger gun valve is closed. Unloaders may be designed to respond to either an increase in pressure or a change in flow. The unloader valve may also be used for variable pressure adjustment. Specifications: Max GPM- 10.5 Max PSI- 3650 Inlet- 2x3/8" F Outlet- 3/8" Max Temp- 194° F By-Pass- 2x3/8" F Spring Color- Blue Knob- Yes