Safety Relief Valve 3/8" MPT with Hose Barb Outlet – OEM Replacement Part
Part Number: 3301
Category: Pressure Washer Components → Safety Relief Valves → Pressure Washer Safety Devices
Type: Adjustable High-Pressure Safety Relief Valve
The Safety Relief Valve 3/8" MPT with Hose Barb Outlet is a high-pressure safety device designed to protect pressure washer systems from dangerous overpressure conditions. Acting as a secondary line of defense when used alongside an unloader valve, this relief valve automatically opens when system pressure exceeds the preset setting, safely releasing water to prevent damage to pumps, hoses, fittings, and other critical system components..
Key Features & Benefits
- High-pressure adjustable safety relief valve
- Pressure adjustment range from 1000 PSI to 6000 PSI
- Factory preset at 1000 PSI
- One valve design covers multiple pressure requirements
- No spring changes required
- Helps protect pumps, hoses, and plumbing components from overpressure
- Hose barb outlet allows safe discharge routing
- Less whistling and chatter than competing valves
- Highly accurate pressure relief performance
- Designed and manufactured in the USA
Technical Specifications
Product Type: Safety Relief Valve
Connection Size: 3/8" MPT
Outlet Type: Hose Barb
Pressure Adjustment Range: 1000–6000 PSI
Factory Preset Pressure: 1000 PSI
Pressure Adjustment: Adjustable
Application: Pressure Washer Overpressure Protection
Country of Manufacture: USA
OEM Replacement: Yes
Typical Applications
- Pressure washer systems
- Commercial pressure washing equipment
- Industrial cleaning systems
- Open-gun pressure washer installations
- Pump protection circuits
- High-pressure fluid systems
- Fleet washing equipment
- Custom pressure washer builds
Performance Advantages
- Provides automatic overpressure protection
- Helps prevent costly pump and plumbing damage
- Adjustable design eliminates the need for multiple spring kits
- Suitable for a wide range of pressure washer systems
- Reduced chatter and noise during operation
- Accurate pressure relief across the adjustment range
- Improves overall system safety and reliability
- Can be used as primary or secondary pressure protection
- Designed for demanding commercial and industrial environments
Installation Recommendations
- Install in accordance with pressure washer manufacturer guidelines.
- Adjust the valve to the desired system pressure setting.
- Route discharged water safely using the hose barb outlet.
- Verify proper operation after installation and pressure adjustment.
- Use as a secondary safety device alongside an unloader whenever possible.
- Inspect pressure settings periodically during routine maintenance.
Maintenance Recommendations
- Inspect the relief valve regularly for leaks, corrosion, or physical damage.
- Verify pressure settings during routine service intervals.
- Test relief valve operation periodically.
- Replace worn or damaged valves immediately.
- Ensure all connected plumbing components are properly pressure rated.
- Follow applicable safety procedures when adjusting system pressure.
