SLP3CP1120-402 Pump Assembly – 3CP1120 Pump w/ Plumbing, VRT Unloader

Part Number: SLP3CP1120-402
Category: Pressure Washer Pumps & Pump Assemblies
Type: Pump Assembly w/ Plumbing – 3CP1120 Belt-Drive, 4.2 GPM @ 2200 PSI

The Pressure-Pro SLP3CP1120-402 Pump Assembly is a factory-built, fully plumbed replacement centered around the 3CP1120 belt-drive pump. Delivering 4.2 GPM at up to 2200 PSI and engineered for 1725 RPM operation, this assembly is designed for belt-driven commercial pressure washer systems that prioritize smooth performance, low pulsation, and extended pump life. Supplied complete with plumbing and a VRT3-310EZ unloader, it provides a true drop-in solution to restore OEM performance while minimizing downtime in light-to-medium commercial environments.

Image shown may differ from the actual product.

Product Specifications

• Pump Model: 3CP1120

• Assembly Type: Complete pump assembly with plumbing

• Pump Type: Triplex Plunger, Belt Drive

• Flow Rate: 4.2 GPM (16 LPM)

• Pressure Range: 100–2200 PSI (7–155 bar)

• Rated Speed: 1725 RPM

• Stroke: 0.500″ (12.7 mm)

• Inlet Pressure Range: Flooded to 70 PSI (4.9 bar)

• Bore: 0.709″ (18 mm)

• Crankcase Capacity: 12 oz (0.35 L)

• Standard Liquid Temperature: 160°F (71°C)

• Inlet Ports: 1/2″ NPTF

• Discharge Ports: 3/8″ NPTF

• Shaft Diameter: 0.650″ (16.5 mm)

• Unloader: VRT3-310EZ (included)

• Manufacturer: Pressure-Pro

• MPN: SLP3CP1120-402

• Condition: New

Features & Benefits

• Triplex design delivers high efficiency with low pulsation

• Durable high-pressure seals lubricated and cooled by pumped liquid

• Pre-set low-pressure seals provide secondary leak protection with no adjustment required

• High-density, polished plungers for extended seal life

• Specially formulated seals for unmatched performance and longevity

• Optional elastomers (STHT, FPM, EPDM) for compatibility with various liquids up to 200°F

• Press-in seal case and interchangeable valves for easy servicing

• Wet-end serviceable without entering the crankcase

• Factory-plumbed for fast, drop-in replacement

Applications

• Belt-driven commercial pressure washers

• Light-to-medium duty cleaning systems

• Replacement pump for compatible Pressure-Pro units

• Equipment repair, refurbishment, and upgrades

Important Notes

• Verify shaft size (16.5 mm), drive type (belt), and RPM compatibility (1725) before ordering

• Designed for systems using 3CP1120 belt-drive pumps

• Final operating PSI and GPM depend on pulley ratio, motor, and overall system configuration