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4000PSI 4.76 GPM Horizontal Triplex Pressure Washer Pump with External Unloader, Fits 1" Q-Type Shaft

(30)
$229.99
In stock
Usually ships within 1 business day
โ—ท Warehouse Hours Monโ€“Fri: 8:30 AMโ€“5:00 PM ET
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Fits Models:

  • Honda GX340 11HP GX390 13 HP 1" Q-Type hollow shafts Gas Engine
  • RSV4G40 Pump
  • DeWalt 4240 Honda Engine
  • ๐…๐ˆ๐“๐Œ๐„๐๐“ โ€“ ๐-๐“๐˜๐๐„ ๐’๐‡๐€๐…๐“ ๐Ž๐๐‹๐˜: Designed ONLY for 1" Q-Type hollow shafts. Fits Honda GX340 11HP and GX390 13HP engines with the correct Q-Type shaft. Not compatible with standard 1" shafts or other shaft types. Verify shaft type before ordering.
  • ๐”๐ ๐“๐Ž ๐Ÿ’๐ŸŽ๐ŸŽ๐ŸŽ ๐๐’๐ˆ & ๐Ÿ’.๐Ÿ•๐Ÿ” ๐†๐๐Œ : Heavy-duty horizontal triplex pressure washer pump delivers up to 4000 PSI and 4.76 GPM for demanding pressure washing applications.
  • ๐‚๐Ž๐Œ๐๐€๐“๐ˆ๐๐‹๐„ ๐€๐๐๐‹๐ˆ๐‚๐€๐“๐ˆ๐Ž๐๐’: Compatible with RSV4G40, RSV4G40HDF40EZ, DeWalt 4240 with Honda engine, Devilbiss EXHP3640, and Annovi Reverberi RKV4G36. Please verify pump specifications before purchase.
  • ๐‚๐„๐‘๐€๐Œ๐ˆ๐‚ ๐๐‹๐”๐๐†๐„๐‘๐’ & ๐๐‘๐€๐’๐’ ๐Œ๐€๐๐ˆ๐…๐Ž๐‹๐ƒ: Ceramic plungers resist wear and pitting, while the forged brass manifold provides excellent strength and corrosion resistance for long service life.
  • ๐“๐‘๐€๐๐๐„๐ƒ-๐๐‘๐„๐’๐’๐”๐‘๐„ ๐”๐๐‹๐Ž๐€๐ƒ๐„๐‘: Uses a trapped-pressure unloader that may retain pressure in the high-pressure hose after shutdown. This is normal. Not suitable if your application requires a flow-actuated unloader that releases pressure after shutdown.

REAL-WORLD TEST & REVIEW

Watch Brian from The Repair Guy put our 4000 PSI Triplex Pressure Washer Pump to the test. See his hands-on inspection and real-world performance testing.

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Video review by Brian โ€“ The Repair Guy.ย  Watch the original video on YouTube .

More Information:
  • High Pressure Triplex Pump 15 Series
  • Max Pressure: 4000 PSI , Flow Rate: 4.76 GPM, 3400 RPM with a 13 HP
  • 1" Q-Typeย Shaft
  • Forged Brass manifold provides high strength and corrosion resistance
  • Anodized die case crankcase with large cooling fin for maximum heat dissipation
  • Hardened and precision grinding crankshaft for maximum durability & longer life
  • Ceramic plunger to increase resistance to pitting and wear
  • Strengthened one piece alloy aluminum connecting rod
  • Reinforced pop off valve cage
  • Ball and roller bearing for max life and load distribution
  • In-line water filter
  • Fixed rate detergent injector
  • Over pressurized prevention jam nut
  • Inlet: Female 3/4"
  • Outlet: 3/8" quick disconnect

Product Specifics:

  • 4.76 GPM 4000 PSI Triplex High Pressure Washer Pump replaces Cat General AR
  • The plunger on this pump is ceramic, increasing resistance to pitting and wear.
  • 1" Hollow Q-Type Shaft fits GX 340 11HP GX 390 13 HP Engine
  • Forged Brass manifold provides high strength and corrosion resistance
  • Thermal relief valve, easy start valve & pressure relief valve
Please note that the unloader needs to be installed onto the pump before use.ย 
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Pleaseย note that the shaft key is included with the engine, not the pump. Our pump does not come with a shaft key.
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If you are not sure, please send us email to support@sigmapowers.com and we will get back to you asap.

Package includes: 1X Pressure Washer Pump
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Orders placed by 2:00 PM ET on a business day are typically shipped the same business day. Orders placed after 2:00 PM ET, or on weekends or holidays, are typically shipped the next business day.

We primarily use USPS, FedEx, and UPS. Most orders are shipped using standard carrier services, and estimated delivery times vary depending on the destination and shipping method selected.

Standard shipping rates generally apply to addresses within the contiguous 48 U.S. states. Additional shipping charges may apply to orders shipped to Alaska, Hawaii, Puerto Rico, Guam, and other U.S. territories.

Expedited shipping options, including Overnight and 2-Day shipping, may be available at checkout for an additional charge.

1. How to Start a Return
Please contact us by email within 30 days of receiving your order before returning any item. We will confirm your eligibility and send instructions.ย Returns sent without prior contact may be delayed or refused.

2. Defective, Damaged, or Incorrect Items
If your item arrives defective or damaged, or if we sent you the wrong item, please email us with your order number and photos showing the issue.
Once the claim is reviewed and approved, we will cover the return shipping cost, if a return is required, and either provide a replacement or issue a full refund.

3. Non-Defective Returns
If you ordered the wrong part, no longer need the item, or simply changed your mind, the item must be unused, uninstalled, and in resalable condition. Used or installed items are generally not eligible for return.

  • You are responsible for the return shipping cost.
  • A 15% restocking fee applies, which may be waived at our discretion.
  • Original shipping and handling charges are non-refundable.

4. Refunds
Refunds are normally issued within 2 business days after the returned item is received and inspected.
Refunds will be issued to the original payment method. Depending on your bank or payment provider, it may take several additional business days for the refund to appear in your account.