Description: Part # 100825 is a brass chemical injector with adjustable hose barb for pressure washing equipment. The chemical injector provides an up to 20% downstream chemical draw, and a flow rate of 3.0-5.0 GPM up to 4500 PSI. May be used with both hot water and cold water pressure washing equipment. Maximum PSI: 4500. Maximum GPM: 5. Inlet Port Size: 3/8" NPT-M. Outlet Port Size: 3/8" NPT-M. Hose Barb Size: 1/4", adjustable. Maximum Temperature: 190°F.