Overview Reviews Product Description Excellent unloader for pressure washers with low pressure and limited space availability. Pressure Range: 400 to 1000 PSI. Maximum Flow: 5 GPM. Maximum Temperature: 200 F. Inlet Port: 3/8" MPT. Outlet Port: 3/8" MPT. Bypass Port: 1/4" FPT. Weight: 5 oz. Product Videos Custom Field Product Reviews Write a Review Write a Review × SMC SMC UNLOADER 4GPM 400-1000PSI Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *