Giant P420AL Pump – Left-Hand Shaft, 12.9 GPM, 2175 PSI, 1460 RPM

Model: P420AL
Category: Pressure Washer Pumps → Triplex Plunger Pumps
Type: Giant P420AL Pump – Left-Hand Shaft, 12.8 GPM, 2175 PSI, 1450 RPM, 28mm Shaft

The Giant P420AL Pump is a heavy-duty triplex plunger pump engineered for demanding commercial and industrial pressure washing and fluid transfer applications. This left-hand shaft configuration pump is built for dependable performance, smooth operation, and long service life in systems requiring high flow and moderate pressure.

Key Features

• Genuine Giant P420AL triplex plunger pump

• Left-hand shaft configuration

• Delivers up to 12.8 GPM at 2175 PSI

• Operates up to 1450 RPM

• Handles inlet pressure from -4.35 to 145 PSI

• Dual 1" NPT inlet ports and dual 3/4" NPT discharge ports

• 28mm crankshaft diameter with 8mm key width

• Supports either-side shaft mounting

• Built for commercial and industrial pressure washer systems

Technical Specifications

Product Name: Triplex Plunger Pump
Manufacturer: Giant Pump
Model: P420AL

Flow Rate: Up to 12.8 GPM
Maximum Pressure: Up to 2175 PSI
Inlet Pressure: -4.35 to 145 PSI
RPM: Up to 1450 RPM
Stroke: 0.945" (24 mm)
Plunger Diameter: 0.98" (25 mm)
Maximum Fluid Temperature: Up to 160°F

Inlet Ports: (2) 1" NPT
Discharge Ports: (2) 3/4" NPT
Shaft Rotation: Top of pulley towards fluid end
Crankshaft Diameter: 1.1" (28 mm)
Key Width: 0.315" (8 mm)
Shaft Mounting: Either side
Weight: 36 lbs. 8 oz. (16.6 kg)
Crankcase Capacity: 27 fl. oz. (0.8 liters)

Volumetric Efficiency @ 1450 RPM: 0.95
Mechanical Efficiency @ 1450 RPM: 0.86
Condition: New

Typical Applications

• Commercial pressure washer systems

• Industrial fluid transfer equipment

• Belt-drive pump setups requiring a left-hand shaft pump

• Equipment needing high flow with moderate pressure

• Applications requiring a 12.8 GPM triplex plunger pump with 28mm shaft