Comet EWD4040G 4000 PSI-4 GPM 1 Inch Shaft Pressure Washer Pump

By : Water Cannon

SKU : 6311.0103.10
  • Quick Specs
  • PSI: 4200
  • GPM: 4
Regular Price: $425.00
In Stock

Forged Bronze Connecting Rods with Lifetime Warranty and Hardened Stainless Steel Piston Guides. COMET PUMPS offer extended life with High Efficiency Stainless Steel Check Valves, Abrasion Proof, Heat Resistant, Industrial Ceramic Plungers and High Quality Buna-Textile Double-Sealing V-Packings. Industry Leading Diecast, Anodized Aluminum Crankshaft-Fin Design for Optimal Operating Temperature.
Powerful triplex plunger pump with VRT3 (Industry Favorite) unloader valve with EZ start features minimizes static back pressure for no load startup, thermal relief safety valve and inline fuel filter. Additionally, this model includes an overheat safety valve that will open and close automatically to allow the recirculating higher temperature water to be released and allow cool water to replace it, helping to protect the wear parts.

Replacing a pressure washer direct drive pump has never been easier with Water Cannon’s complete ready to install pump packages.
Factory tested replacement pump installs easily with four bolts and includes an unloader, pressure relief valve, quick connect, chemical injector siphon hose, and garden hose inlet with stainless steel filter. It has a 1" hollow shaft and is designed for direct mounting to a Honda, Kohler, Vanguard or top brand gas engine. An internal thermal relief value automatically protects the pump, while solid ceramic plungers run cooler on dual redundant packings and extend the life of the pump.

Pressure washers are only a part of the Water Cannon story. With a vast selection of Annovi Reverberi (AR), General Pump, and Cat Pump Pressure Washer Replacement Pumps, the preferred brands for the rental and construction industries. The pros know best. Finally, Water Cannon is your go-to source for pump repair kits, bypass regulators, overheat thermal sensors, water filters, and specially formulated pump oil. No matter what your pressure washer pump application requires, Water Cannon has what you need.


  • VRT-3 Multi-function Unloader with Easy Start
  • Thermal Relief
  • 3/8” Loop Bypass 
  • Injector
  • 3ft. Soap Hose
  • Garden Hose Fitting
  • 3/8” Coupler
  • Heavy-Duty Brass Pump Head
  • Aluminum Alloy Reversible Carter
  • Stainless Steel Hardened Piston Guides
  • Dust Protection Plugs
  • Wide Oil Level Viewer
  • O-Rings & Labyrinth Oil Seal System To Reduce Oil Splash
  • Single Piece Aluminum Alloy Conrods
  • Oversized Ball Bearings
  • Removable Stainless Steel Check Valves
  • Corrosion & Abrasion Proof Ceramic Plungers
  • Double Sealing System


  • 4.0 GPM
  • 4200 PSI
  • 3400 RPM
  • 1 Inch Shaft

Helpful tips to keep your pressure washer pump operating at peak performance

California Residents - Click here for Prop 65 WARNINGS


Manufacturer: Water Cannon
SKU: 6311.0103.10
PSI: 4200
GPM: 4
Drive Type: 1 Inch Shaft
Brand: COMET
RPM: 3400
Shaft size: 1 INCH

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