Factory-Direct Free Shipping within 72 hours.  
In-Stock items ship direct from our Rialto, CA. Store within 24 hrs. 

4DNX27GSI Triplex Plunger Pump

The 4DNX27GSI model is a high quality, intermittent-duty pressure washer pump. It is a flange-mount pump with a 3/4" shaft. The triplex plunger pump design provides a smooth liquid flow. Its ultra-compact, hollow shaft design is ideal for direct mounting to a gas engine.

This direct drive pressure washer pump has specially formulated high pressure seals and concentric solid ceramic plungers for extended seal life. It features a stacked valve design for easy servicing. Other features include a fixed chemical injector for cleaning flexibility and a swivel garden hose fitting for easy inlet connection. An integral pressure unloader with built-in by-pass comes standard to ensure system pressure control and pump protection.

4DNX25GSI Pump Specifications:

• Maximum flow: 3.9 GPM
• Maximum discharge pressure: 4000 PSI
• Maximum RPM: 3450 RPM
• Stroke: 7.2mm
• Inlet pressure range: flooded to 60 PSI
• Bore: 0.551"
• Crankcase capacity: 8.5 oz.
• Maximum liquid temperature: 140 degrees F
• Inlet port: 3/4" GHF
• Accessory inlet port: 1/4" NPTF
• Discharge port with chemical injector: 3/8" NPTM
• Chemical injection hose barb: 1/4"
• Shaft diameter (hollow): 1"
• Three plunger rods (triplex design)

Assembled in the USA