GP TP2530J34 Pump Assembly – 3.0 GPM, 2,500 PSI, 3/4" Shaft
Part Number: 85.139.020SPB
Bare Pump Part #: 85.130.020SP
Pump Model: TP2530J34
Pump Type: Triplex | Direct-Drive | Gas
Reliable Triplex Pump for Residential, Agricultural & Light Commercial Use
The GP TP2530J34 Pump Assembly is a durable, direct-drive triplex pump designed to deliver smooth, consistent cleaning power with long service life. Producing 2,500 PSI at 3.0 GPM, this pump is an excellent replacement or upgrade for gas-powered pressure washers used in residential, agricultural, and light commercial applications.
Manufactured by General Pump (GP)—a trusted leader in pressure washer pump technology—the TP2530J34 features a brass manifold, ceramic plungers, and an external unloader for improved reliability and ease of maintenance. Backed by a 5-year warranty, this pump is built for dependable performance job after job.
Key Features
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Triplex Plunger Design
Smoother operation, reduced vibration, and longer pump life than axial pumps -
Ceramic Plungers
Excellent resistance to heat and wear for extended durability -
Brass Manifold
Corrosion-resistant and built to withstand repeated high-pressure cycles -
External Unloader (85.300.003)
Easier pressure adjustment and servicing compared to internal unloaders -
Adjustable Soap Injector (85.400.000)
Controlled detergent application for more effective cleaning -
Thermal Relief Valve (85.300.023)
Protects the pump from overheating during extended bypass operation -
Direct-Drive Gas Configuration
Designed for 3/4" horizontal shaft gas engines running at 3,450 RPM
Specifications
| Specification | Detail |
|---|---|
| Pump Model | GP TP2530J34 |
| Pump Type | Triplex |
| Drive Type | Direct Drive (Gas) |
| Max Pressure | 2,500 PSI |
| Max Flow | 3.0 GPM |
| Shaft Size | 3/4" Horizontal |
| RPM | 3,450 |
| Plunger Material | Ceramic |
| Manifold Material | Brass |
| Inlet Size | 3/4" GHF |
| Discharge Size | 3/8" Brass Quick Connect (85.300.103) |
| Unloader | External – 85.300.003 |
| Soap Injector | Adjustable – 85.400.000 |
| Thermal Relief Valve | 85.300.023 |
| Max Inlet Water Temp | 74°C / 165°F |
| Oil Type | 30W Non-Detergent |
| Oil Capacity | 11 oz |
| Weight | 11.5 lbs |
| Warranty | 5 Years |
Engineered for Smooth, Dependable Performance
The TP2530J34’s triplex plunger design delivers smoother output and greater longevity than axial pumps. With 2,500 PSI of pressure and 3.0 GPM of flow, it provides a balanced combination of cleaning force and water volume—ideal for efficiently covering large surface areas without excessive strain on the system.
The brass manifold resists corrosion and pressure fatigue, while the ceramic plungers handle heat and abrasion with ease, ensuring reliable performance over time.
User-Friendly & Serviceable Design
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External Unloader: Allows pressure adjustment and maintenance without disturbing the pump body
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Adjustable Soap Injector: Enables precise detergent delivery when using low-pressure nozzles
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Brass QC Discharge (3/8"): Fast, secure hose connections with reduced leak risk
Protection & Maintenance
To safeguard internal components during extended bypass cycles, the included thermal relief valve (85.300.023) automatically purges overheated water and replaces it with cooler supply water.
Routine maintenance is straightforward:
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Requires 11 oz of 30W non-detergent oil
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Simple oil checks and scheduled changes help maximize pump life
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Rated for inlet water temperatures up to 165°F (74°C) for added flexibility
At just 11.5 lbs, this pump is lightweight and easy to install while still built for long-term durability.
Typical Applications
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Concrete Cleaning: Driveways, sidewalks, and walkways
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Decks, Patios & Fencing
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Vehicle & Fleet Washing
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Agricultural Equipment & Farm Machinery
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Light Construction & Jobsite Cleanup
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Residential & Property Maintenance
