Canpump CH 2830 G: 2800 psi @ 3 US gpm Pressure Washer Replacement Pump 3/4 NEW by | Jul 23, 2026Canpump Pressure Washer Pump. The hardened, precision-ground crankshaft and solid stainless steel, ceramic-coated plunger ensure maximum durability and long lifespan. Flow Rate 4.7 US gpm 4.8 US gpm 5 US gpm 3.1 US gpm.