CAT 7500S 2SF Pressure Washer Unloader Valve 1–6 GPM 100–2000 PSI – OEM Replacement Part
Part Number: 2799
Category: Pressure Washer Parts → Unloader Valves → Pressure Actuated Unloader Valves
Type: CAT Pumps 7500S 2SF Pressure Washer Unloader Valve
The CAT Pumps 7500S 2SF Pressure Washer Unloader Valve (Part #2799) is a genuine OEM replacement pressure-actuated unloader designed for CAT Pumps 2SF series pressure washer pumps and other compatible systems operating between 1 and 6 GPM with adjustable pressures from 100 to 2,000 PSI. Manufactured by CAT Pumps, this compact unloader automatically diverts water into bypass mode when the spray gun is released, protecting the pump and high-pressure components from excessive pressure buildup.
Key Features & Benefits
- Genuine CAT Pumps OEM replacement unloader valve
- Designed for CAT Pumps 2SF series pumps
- Pressure-actuated bypass operation
- Adjustable pressure range from 100 to 2,000 PSI
- Supports flow rates from 1 to 6 GPM
- Protects pumps from damaging pressure spikes
- Provides smooth bypass operation
- Compact and durable design
- Suitable for hot and cold water pressure washers
- OEM-quality fit and performance
- Long service life
- Easy installation
Technical Specifications
Part Number: 2799
Manufacturer: CAT Pumps
Model: 7500S (2SF)
Product Type: Pressure Actuated Unloader Valve
Flow Range: 1–6 GPM
Pressure Adjustment Range: 100–2,000 PSI
Maximum Pressure: 2,000 PSI
Maximum Temperature: 160°F
Inlet Connection: 3/8" MPT
Outlet Connection: 3/8" MPT
Operation Type: Pressure Actuated
OEM Replacement: Yes
How the 7500S Unloader Works
The 7500S automatically regulates pressure within the pressure washer system.
When the spray gun is released:
- Water flow stops at the nozzle.
- System pressure rises.
- The unloader shifts into bypass mode.
- Water is redirected through the bypass circuit.
- The pump is protected from excessive pressure buildup.
When the trigger gun is pulled:
- Water flow resumes through the outlet.
- Operating pressure is restored.
- Cleaning continues normally.
This automatic operation reduces wear on pumps, hoses, fittings, and spray guns while maintaining safe system operation.
Common Applications
Residential & Commercial Pressure Washers
Ideal for:
- Residential pressure washers
- Light commercial cleaning equipment
- Property maintenance
- Vehicle washing
- Equipment cleaning
Industrial Cleaning Equipment
Suitable for:
- Wash-down stations
- Agricultural equipment cleaning
- Service facilities
- Maintenance departments
- Custom pressure washer systems
Compatible Pressure Washer Systems
Designed for:
- CAT Pumps 2SF series pumps
- Direct-drive pressure washers
- Belt-drive pressure washers
- Hot water pressure washers
- Cold water pressure washers
Performance Benefits
- Reliable pressure regulation
- Smooth bypass operation
- Improved pump protection
- Reduced pressure spikes
- Consistent cleaning performance
- Extended equipment life
- Durable OEM construction
- Lower maintenance costs
Signs an Unloader Valve Needs Replacement
Replace the unloader if you notice:
- Pressure fluctuations
- Reduced cleaning pressure
- Water leaks around the valve
- Difficulty adjusting pressure
- Inconsistent bypass operation
- Delayed trigger response
- Internal wear or corrosion
Installation Notes
- Verify compatibility with your pressure washer pump and operating specifications.
- Apply thread sealant to threaded connections where required.
- Install the unloader according to the manufacturer's recommendations.
- Adjust operating pressure using a calibrated pressure gauge.
- Test bypass operation before returning the pressure washer to service.
- Inspect all fittings for leaks.
Important: Ensure all pressure washer components, including hoses, spray guns, and nozzles, are rated for the intended operating pressure.
Maintenance Recommendations
- Inspect the unloader regularly for leaks and wear.
- Verify proper pressure adjustment during routine maintenance.
- Keep inlet water filtration clean.
- Monitor bypass operation for consistent performance.
- Replace worn seals or rebuild the valve as needed.
- Follow CAT Pumps recommended maintenance intervals.
