PowerWash

Comet HWD 5540 G Gas Flange Hollow Shaft Pressure Washer Pump

$787.47

SKU: 6405.0400.00

Product Information

This HWD Series 1″ Hollow Shaft Pressure Washer Pump features a reversible crankcase for easy right- or left-hand mounting & boasts 5.3 GPM & 4000 PSI performance.

Product Details

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

Specifications:

Gas Engine Flange

1″ Hollow Shaft

3400 RPM

5.3 GPM

4000 PSI

18mm Piston

Inlet: 1/2″ FPT

Outlet: (Discharge) 3/8″ FPT

Approximate Weight: 22.5 lbs.

Shipping & Delivery

Fast nationwide shipping via UPS
Most orders arrive within 5–10 business days.
Direct-from-manufacturer items may take up to 14 business days
If a product will take longer than expected, a PowerWash.com account executive will contact you.
Backorder notifications
If an item becomes unavailable or delayed, our team will notify you immediately with options.
Freight delivery for large equipment
Oversized items ship by truck freight. Lift-gate service is available if needed.
Alaska & Hawaii shipping
Delivery to AK/HI may take up to 30 business days. (Some chemical products cannot ship to AK/HI.)
International shipping available
We ship to most countries worldwide. Call 1-800-433-2113 for rates.
Order minimum
Orders under $15 may incur a minimum order fee.
Track your order anytime
You can check your order status using the Orders & Returns page.

Returns & Warranty

30-Day Return Window (Unused Items)
Unused products in original packaging can be returned within 30 days of delivery.

Simple Return Process
Just contact our team to receive an RMA (Return Authorization) before sending anything back.

Restocking Fee
Returns may be subject to a 20% restocking fee.

Non-Returnable Items
Due to safety and usage factors, the following items cannot be returned:
– Pressure washers (covered under warranty only)
– Chemicals / hazmat products
– Custom or special-order equipment

Manufacturer Warranties Apply
Many products are backed by manufacturer warranties (pumps, engines, accessories, etc.).
Coverage varies by brand and product type.

Defective or Damaged Items
If something arrives damaged or defective, contact us immediately so we can make it right.

View full returns & warranty policy.

Support

Support & Questions

Talk to a real pressure washing expert
Our team helps contractors choose the right equipment, chemicals, and setup.

Need help before ordering?
We can help you confirm:
– Proper sizing (GPM, PSI, fittings)
– Product compatibility
– Best setup for your job

Support after purchase
We’re here to help with setup, usage, and troubleshooting.

Call or speak with our team
1-800-433-2113

Fast response from experienced staff
No call centers — you’ll speak with someone who understands the equipment.