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This HW Series 24mm Solid Shaft Pressure Washer Pump features a reversible crankcase for easy right- or left-hand mounting & boasts 4.4 GPM & 4000 PSI performance.


Comet HW 4540 S Solid Shaft Pressure Washer Pump

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SKU: 6403.0400.00
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Designed as a popular replacement for medium duty Industrial Pressure Washers, the HW Series of Pumps feature a reversible crankcase for easy right- or left-handed mounting. They also feature Hardened Stainless Steel Piston Guides, Highly Efficient Stainless Steel Check Valves, HW Series Pumps boast a 5-Year Warranty from Comet.

All Comet HW Series pumps include:

  • Hardened Stainless Steel Piston Guides

  • Highly Efficient Stainless Steel Check Valves

  • Solid Ceramic Plungers

  • High & Low Pressure Seals: High Quality Buna-Textile Packings

  • Additional Anti-Extrusion Ring Under the Seal

  • Solid Brass Manifolds

  • Special Forged Brass Oversized Connecting Rods

  • Die-Cast, Anodized Aluminum Crankcase

  • High Quality Tapered Roller Bearings

  • Optimal Oil Bath for High Speed Operation

  • 5-Year Pump Warranty


  • 24mm Solid Shaft

  • 1450 RPM

  • 4.4 GPM

  • 4000 PSI

  • 18mm Piston

  • Inlet: 1/2″ FPT

  • Outlet: (Discharge) 3/8″ FPT

  • Approximate Weight: 22.0 lbs.

Weight 23 lbs
Shaft Diameter

.945 in / 24 mm

Max Discharge Pressure

4000 PSI

Max Pump Speed

1450 RPM

Inlet Port

1/2-14 BSPP-F

Discharge Port

3/8-19 BSPP-F





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