Interpump K5.1 Flow Sensitive Unloader Valve – 200 Bar, 11–16 LPM, 3/8" Inlet, 1/2" OutletThe Interpump K5. 1 is a medium duty flow sensitive unloader valve, engineered to provide safe, efficient regulation for professional pressure washer systems. By redirecting water through the bypass line when the spray gun is released, it reduces pump load and minimises system stress. Rated for 200 Bar maximum pressure with a flow range of 1116 L min, the K5. 1 suits applications where mid range pressure and flow are required, such as mobile cleaning