PA VB3KTT Pressure Washer Unloader Valve 6.5 GPM Adjustable 323 PSI to 3650 PSI 1/4" – OEM Replacement Part
Part Number: 6017
Category: Pressure Washer Parts → Unloader Valves → Pressure Actuated Unloader Valves
Type: PA YVB3KTT Pressure Washer Unloader Valve
The PA YVB3KTT Pressure Washer Unloader Valve (Part #6017) is a genuine OEM replacement pressure-actuated unloader designed for commercial and industrial pressure washer systems operating up to 6.5 GPM and 3,650 PSI. Manufactured by PA (PA S.p.A.), this compact, adjustable unloader provides precise pressure regulation while protecting pumps and plumbing components from excessive pressure buildup.
Key Features & Benefits
- Genuine PA OEM replacement unloader valve
- Pressure-actuated bypass operation
- Adjustable pressure range from 323 PSI to 3,650 PSI
- Rated for up to 6.5 GPM flow
- Compact design with 1/4" MPT inlet
- Protects pumps from pressure spikes
- Maintains consistent operating pressure
- Durable commercial-grade construction
- Suitable for hot and cold water pressure washers
- Easy pressure adjustment
- Reliable long-term performance
- Ideal for commercial and industrial cleaning systems
Technical Specifications
Part Number: 6017
Manufacturer: PA (PA S.p.A.)
Model: YVB3KTT
Product Type: Pressure Washer Unloader Valve
Maximum Flow Rate: 6.5 GPM
Pressure Adjustment Range: 323 PSI – 3,650 PSI
Maximum Pressure: 3,650 PSI
Maximum Temperature: 195°F
Inlet Connection: 1/4" MPT
Outlet Connection: 3/8" MPT
Bypass Connection: 3/8" FPT
Operation Type: Pressure Actuated
OEM Replacement: Yes
Adjustable Pressure Control
The YVB3KTT allows operators to easily adjust system pressure to suit different cleaning tasks.
Benefits include:
- Precise pressure adjustment
- Improved cleaning versatility
- Reduced equipment wear
- Optimized cleaning performance
- Adaptability for multiple applications
Its wide pressure adjustment range makes it suitable for both light-duty and demanding commercial cleaning operations.
How the Unloader Valve Works
When the spray gun is closed:
- System pressure increases
- The unloader valve activates
- Water is redirected through the bypass circuit
- Excess pressure is relieved
- The pump and plumbing system are protected
When the trigger gun is reopened:
- Water flow returns to the outlet
- Full operating pressure is restored
- Cleaning resumes immediately
This automatic operation helps maintain safe, efficient pressure washer performance.
Common Applications
Commercial Pressure Washing
Ideal for:
- Mobile pressure washing units
- Property maintenance contractors
- Fleet washing
- Equipment cleaning
- Building maintenance
Industrial Cleaning Systems
Suitable for:
- Manufacturing facilities
- Agricultural equipment
- Service centers
- Wash bays
- Industrial maintenance operations
Hot & Cold Water Pressure Washers
Compatible with:
- Hot water pressure washers
- Cold water pressure washers
- Belt-drive systems
- Direct-drive systems
- Custom pressure washer builds
Performance Benefits
- Reliable pressure regulation
- Adjustable cleaning pressure
- Improved pump protection
- Reduced pressure spikes
- Consistent system performance
- Compact installation
- Long service life
- Lower maintenance costs
Signs an Unloader Valve Needs Replacement
Replace the valve if you notice:
- Pressure fluctuations
- Water leaks around the valve
- Difficulty adjusting pressure
- Reduced cleaning performance
- Inconsistent bypass operation
- Trigger response issues
- Internal wear or corrosion
Installation Notes
- Verify compatibility with your pressure washer system.
- Confirm flow and pressure requirements before installation.
- Apply thread sealant to threaded connections as needed.
- Connect bypass plumbing according to system design.
- Adjust operating pressure after installation.
- Test for leaks and proper bypass operation before returning the unit to service.
Important: Ensure all pressure washer components, including pumps, hoses, guns, and fittings, are rated for the intended operating pressure.
Maintenance Recommendations
- Inspect the unloader regularly for leaks and wear.
- Verify pressure settings during routine maintenance.
- Maintain clean inlet water filtration.
- Monitor bypass operation.
- Replace worn seals and internal components as needed.
- Follow PA recommended service intervals.
