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General EZ4040G – Pressure Washer Pump – Bare

Rated 5.00 out of 5 based on 2 customer ratings
(2 customer reviews)


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General Pump EZ4040G – Pressure Washer Pump – Bare

General Pump / Interpump EZ4040G pressure washer pump 4000 PSI @ 4.0 GPM is a bare pump with no plumbing. Use your old plumbing parts and save money, OR if your not sure if your parts are OK, please order the EZ4040G-SUB that comes complete !

• Standard SAE J609 gasoline mounting flange for up to 13 hp engines
• Forged brass manifold with an exclusive lifetime warranty and 3:1 hydrostatic rating
• Die-cast, anodized aluminum oil-bath crankcase
• Innovative one-piece plunger design to eliminate water entering crankcase
• Premium roller bearing
• 5% reduction in crankcase load compared to standard 4,000 PSI, 15 mm pumps
• Unitized stainless steel inlet and discharge valves
• Available in “L” left-handed versions

Maximum Volume


Max. Discharge Pressure

4000 PSI

Maximum Pump Speed

3400 RPM

Maximum Inlet Pressure

125 PSI

Plunger Bore

.512 in. / 13 mm

Plunger Stroke

.512 in. / 13 mm

Crankcase Oil Capacity

14 oz.

Maximum Fluid Temperature
Inlet Port Thread

1/2″- 14 BSPP-F

Discharge Port Thread

3/8″- 19 BSPP-F

Shaft Diameter


1.0 in. / 25.4 mm


20 lbs.


8.8” x 9.7” x 6.5


Additional information

Feature 3


Feature 4


Feature 7

Pump Shaft Size

1" Hollow Shaft

Feature 2

Feature 8

Feature 9

Feature 10

Feature 5

Pump Type

Feature 6

2 reviews for General EZ4040G – Pressure Washer Pump – Bare

  1. Rated 5 out of 5


    Performs great, give me the power I needed and more. I’ve never had a problem with this pump. Easy Installation A++.

  2. Rated 5 out of 5


    Very pleased with my new pump yall do a great job I ordered it Monday and it was delivered Tuesday at noon yall are great and will definitely be ordering more from yall

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Product Enquiry


All pumps require both a primary pressure regulating device (i.e. regulator, unloader) and a secondary pressure safety relief device (i.e. pop-off valve, safety valve). Failure to install such relief devices could result in personal injury and/or damage to the pump and/or to the system components. We do not assume any liability or responsibility for the operation of a customers high pressure system.

Repair Parts for this item:

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