K7.2 Unloader Valve with #1 Bypass Orifice – OEM Replacement Part
Part Number: 2301
Category: Pressure Washer Parts → Unloader Valves → Pressure Washer Regulators
Type: General Pump K7.2 Unloader Valve with #1 Bypass Orifice
The General Pump K7.2 Unloader Valve with #1 Bypass Orifice (Part #2301) is a professional-grade OEM replacement unloader designed to provide reliable pressure regulation and pump protection for commercial and industrial pressure washer systems. Manufactured by General Pump, this pressure-actuated unloader is rated for up to 3,500 PSI, flow rates from 4.2 to 6.6 GPM, and operating temperatures up to 195°F.
Key Features & Benefits
- Genuine General Pump OEM replacement unloader valve
- Includes #1 bypass orifice
- Rated up to 3,500 PSI
- Flow range of 4.2 to 6.6 GPM
- Pressure-actuated bypass operation
- Automatically diverts water flow during trigger release
- Helps protect pumps and plumbing components from pressure spikes
- Smooth pressure regulation and bypass performance
- Suitable for hot and cold water pressure washers
- Heavy-duty commercial construction
- Reliable long-term performance
- Ideal for pressure washer repairs and replacements
Technical Specifications
Part Number: 2301
Manufacturer: General Pump
Model: K7.2
Product Type: Pressure Washer Unloader Valve
Bypass Orifice: #1
Maximum Pressure: 3,500 PSI
Flow Range: 4.2 – 6.6 GPM
Maximum Temperature: 195°F
Inlet Connection: 3/8" BSP-F
Outlet Connection: 3/8" BSP-M
Bypass Connection: 3/4" BSP-M
Unloader Type: Pressure Actuated
OEM Replacement: Yes
What an Unloader Valve Does
The K7.2 is designed to:
- Regulate operating pressure
- Divert water flow when the spray gun is released
- Prevent excessive pressure buildup
- Protect pumps, hoses, spray guns, and fittings
- Improve equipment reliability
- Extend pressure washer service life
When the trigger gun is closed, water is automatically redirected through the bypass circuit until cleaning resumes.
Benefits of the #1 Bypass Orifice
The included #1 bypass orifice helps provide:
- Controlled bypass flow
- Smooth pressure transitions
- Stable operating pressure
- Reduced system shock
- Improved pump protection
- Consistent unloader performance
Proper bypass flow management helps improve overall system efficiency and longevity.
Common Applications
Commercial Pressure Washing
Ideal for:
- Professional pressure washers
- Mobile wash systems
- Contractor cleaning equipment
- Fleet washing units
- Property maintenance operations
Industrial Cleaning
- Equipment wash-down stations
- Manufacturing facilities
- Agricultural cleaning systems
- Maintenance departments
- Industrial cleaning applications
Hot & Cold Water Systems
Suitable for:
- Hot water pressure washers
- Cold water pressure washers
- Skid-mounted systems
- Trailer-mounted pressure washers
- Custom cleaning equipment
Performance Benefits
- Reliable pressure regulation
- Improved pump protection
- Reduced component wear
- Smooth bypass operation
- Consistent cleaning performance
- Extended equipment life
- Professional-grade durability
- Reduced maintenance requirements
Signs an Unloader Valve Needs Replacement
Replace the unloader if you experience:
- Pressure fluctuations
- Excessive bypass flow
- Water leakage around the valve
- Difficulty adjusting pressure
- Reduced cleaning performance
- Pump cycling issues
- Inconsistent operating pressure
- Worn internal components
Installation Notes
- Shut down the pressure washer and relieve all system pressure.
- Verify compatibility with system pressure and flow requirements.
- Install using the proper BSP-threaded connections.
- Apply thread sealant where required.
- Confirm the correct bypass plumbing configuration.
- Adjust operating pressure using a calibrated pressure gauge.
- Test the system for leaks and proper bypass operation.
Important: Always ensure all pressure washer components, including pumps, hoses, spray guns, and fittings, are rated for the system's operating pressure and flow.
Maintenance Recommendations
- Inspect regularly for leaks and wear.
- Verify pressure settings during scheduled maintenance.
- Maintain clean inlet water filtration.
- Monitor bypass performance.
- Replace worn seals and internal components when necessary.
- Follow General Pump maintenance recommendations.
