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Silver metal triplex plunger pump with horizontal shaft and brass fittings

VEVOR

VEVOR Pressure Washer Pump 3/4" Shaft 3700 PSI 2.5 GPM

SKU CH-4Q97-8EX2V

Replacement triplex plunger pump with a 3/4 inch shaft delivers up to 3300 PSI and 2.5 GPM for gas pressure washers

  • Product typeOther Appliances
  • Overall width9.84
  • 3700 PSI rated pressure tackles tough grime on walls and drives
  • 5 GPM flow rate speeds up large-area cleaning jobs
  • 3/4 inch shaft fits Simpson MorFlex 40224, 40225, 40226 models
  • Triplex plunger design delivers smooth, consistent water output
  • Kit includes detergent hose, bolts, shaft key and washers for quick install

Replacement Pressure Washer Pump

This VEVOR pump replaces a worn or damaged unit on residential gas pressure washers. It delivers a maximum pressure of 3300 PSI and a flow rate of 2.5 GPM for cleaning walls, sidewalks and vehicles. The horizontal triplex plunger design fits a 3/4 inch engine shaft. The kit includes the pump, detergent hose, mounting bolts, vent plug, shaft key and washers.

Suitable for Horizontal Engine Match

This unit suits owners of Simpson MorFlex models 40224, 40225, 40226 and Santoprene model 41182 with horizontal engines. Buyers must verify engine orientation, shaft diameter, PSI, GPM and connection types before purchase. It is not for users with vertical shaft engines or different bolt patterns. It also does not meet the needs of buyers requiring an operating pressure above 2600 PSI.

3/4 Inch Shaft Diameter

The pump mounts on a 3/4 inch (19.05 mm) engine shaft using the included 4.78 mm shaft key and UNF5/16-24 bolts. This shaft size is the primary fitment check for compatibility. The pump weighs 12.1 lbs and measures 9.62 x 7.7 x 6.22 inches. Match these specifications to your existing equipment to confirm the part is correct.

How it compares

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Price $94.99
Pricier than about 88% of the 5,998 comparable items (median $24.99).

Specifications

Product
Product typeOther Appliances

Questions about this item

How do I install the pump onto a 3/4" engine shaft and which step is often missed?

Mount the pump using the four UNF5/16-24 bolts with flat pads and spring washers, then insert the 4.78 mm shaft key into the keyway; the key is the step most often forgotten.

What maintenance will this triplex plunger pump need over time?

Replace the crankcase oil after the initial break-in period and at regular intervals, and inspect the three plunger seals and valve assemblies for wear.

What pressure limit appears first during sustained operation?

The recommended operating pressure of 2600 PSI is the continuous limit; the 3300 PSI maximum is only for brief peaks.

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