Check the listing for details. 3500PSI, 3.4GPM Comet Direct Drive Pump with Unloader ZWD-K 3535G. Condition: New. Listed at 339.65 USD. Comet ZWD-K 3535G Pump with Built-In Unloader and Chemical Injector. This 3, 500 PSI & 3.4 GPM pump is designed to direct drive on gasoline 1” Hollow Shaft engines ranging from 9 - 13 HP Features• Built-In adjustable unloader with chemical injector• 1/2” FPT Inlet – 3/8” Outlet• Reversible Crankshaft for Easy Right or Left Hand Mounting• Increased Fin Depth Increases Surface Area to Maximize Heat Dissipation• Stainless Steel Unitized Check Valves• Heat-Resistant Solid Ceramic Plungers Operating on Lubricated Packings• Direct Drive Gas Engine Mounting Flange (SAE J609B)• Reinforced Crankcase for Increased Load Capacity• Enlarged Crankcase Increases Oil Capacity for Better Lubrication and Lower Operating Temperatures• One-Piece Industrial-Grade Oversized Bronze Connecting Rods Specifications• Max. Volume: 3.4 GPM• Max. Discharge Pressure: 3,500 PSI • Max. Pump Speed: 3,400 RPM• Shaft Diameter: 1” Hollow• Max. Horsepower Requirements: 10.82 GHP • Inlet Port: 1/2" FPT• Outlet Port: 3/8" Male NPT • Oil capacity: 14 oz• Weight: 19.5 lb. >