General Pump PMREZ4040G
General Pump PMREZ4040G
Hover to zoom
1 Of 5

General Pump Fully Plumbed EZ4040G 4000 PSI 4.0 GPM 1" Hollow Shaft Replacement Triplex Plunger Pump (3400 RPM)



Write a Review
Free Shipping
  Learn More About Free Freight
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
Ships in 2-5 Business Days
Factory items ship direct from the manufacturer. Shipping times vary.
Shipping Details
*We currently CANNOT ship this product to Canada or any destination outside of the United States

General Pump Fully Plumbed EZ4040G 4000 PSI 4.0 GPM 1
General Pump Fully Plumbed EZ4040G 4000 PSI 4.0 GPM 1" Hollow Shaft Replacement Triplex Plunger Pump (3400 RPM)
Model: PMREZ4040G
Product Q&A
How-To Articles






  • Fully Plumbed EZ4040 Replacement Pump
  • Fully Plumbed are ready to go - 4 bolts off - 4 bolts on
  • Get a great high-quality replacement assembly for less than a repair
  • Comes with unloader, pressure relief valve, pressure washer hose plug, and garden hose inlet w/ filter
  • 1-Inch Hollow Shaft w/ Gas Flange
  • Quick coupler and plug included
  • Offers Maximum 4000 PSI & 4 GPM
  • Premium roller bearing
  • Provides a smooth liquid flow at 3400 RPM
  • Unitized stainless steel inlet and discharge valves
  • Pulsar EZ Unloader
  • Adjust the pressure to suit the task at hand
  • Eliminates back pressure when pulling a manual start engine
  • External Bypass Hose
  • Carries water to the inlet when the unloader valve opens
  • Adds safety if water circulates in pump for too long and quickly heats to dangerous temperatures
  • Die-Cast, Anodized Aluminum Oil-Bath Crankcase
  • One-piece plunger design eliminates water entering crankcase
  • 5% reduction in crankcase load compared to standard 3,000 PSI, 15 mm pumps
  • Be Sure To Measure Flange Bolt Holes & Shaft Accurately!
  • There is a 25% restock fee on returned pumps
  • Pumps should not be allowed to operate in bypass mode for more than 1 minute
  • Please Call Us For Sizing Assistance w/ Information Below:
  • 1. Age of Pump and Model # (must be no more than 15-yrs old)
  • 2. Is the pump Vertical or Horizontal
  • 3. Shaft Size - 3/4", 7/8" (vertical ONLY), 1", or Belt Drive XXmm
  • 4. Engine Brand and HP (model # if available would be helpful)
  • ***Shaft Size Measurements Must Be Precise***
California residents see
Warning: This product can expose you to chemicals including Lead which is known to the State of California to cause Developmental Harm.
For more information go to:


Pump Brand
General Pump
Pump Type
Triplex Plunger
Shaft Size
Pump Design
Adjustable Pressure
Accessory Grade
Accessory Style
Maximum GPM Learn More
Maximum GPM
Gallon per Minute
Rated PSI
4000 PSI
Chemical Injections
Sold Separately
Consumer Warranty
5 Years


General Pump PMREZ4040G Reviews & Ratings

Product Q&A

Be the First to Ask A Question Answered by Jim. the Pressure Washer Expert

Recommended Accessories

Expert Recommended Accessories Selected by Jim, our Expert
Required Accessories 9
These accessories are required to properly setup/install this product.
Optional Accessories 10

How-To Articles

How To Pick The Perfect Replacement Pressure Washer Pump
If your pressure washer turns on, but won't pressurize water, don't give up on ...
How to Replace the Pump on a Pressure Washer
Pressure washer pumps can be burned out in many ways. It's more common than you...
Pressure Washers How-To Library
Articles, Tips and Buying Guides from Our Experts


Media Gallery
General Pump Fully Plumbed EZ4040G 4000 PSI 4.0 GPM 1" Hollow Shaft Replacement Triplex Plunger Pump (3400 RPM)
General Pump PMREZ4040G
Reset View
Customer Review Images