The J.E. Adams 5030NPW is a spray gun designed with a weep system to keep your lines from freezing. It allows a continuous drip of water to flow through the gun. The gun handles a maximum pressure of 4500 PSI and flow rate of 12 GPM. Built to withstand a maximum water temperature of 300 degrees Fahrenheit. It is equipped with a 3/8" FPT inlet and a 1/4" FPT outlet.