Description
MODEL 9 QE CHECK VALVE KIT (DROP IN LINE)
PART NUMBER(S):
5000457 | 5000457BXW
DESCRIPTION:
Model: Model 9 QE Check Valve Kit
Engines: Compatible with air brake systems using Model 9 air dryers
Vehicles: Kenworth trucks (explicit OE reference 5000457BXW), commercial trucks and buses with Model 9 air dryers
• Thread size: 3/4"
• Mounting Style: Drop-in line, vertical installation
Applications: One-way check valve kit designed for Model 9 air dryer assemblies. Maintains air system pressure by preventing backflow in 4-line air dryer systems. Ready-to-install drop-in design allows fast replacement and OEM-grade reliability, widely used on Kenworth trucks and other commercial vehicles.
CROSS-REFERENCE(S):
5000457, 5000457BXW, FP5000457, 7-5000457, TR-5000457, TP5000457, AS5000457, SC5000457, PP5000457, ST5000457, PHD5000457, PH5000457, VIP5000457, FC5000457, HDA5000457, A-5000457
A cross-reference listing means part numbers compatible or equivalent to this product for cross-application and inventory matching purposes.
IMPORTANT INSTALLATION NOTES:
Always depressurize air system before servicing or installing valve kit.
Verify 3/4" thread size for correct fitment in Model 9 air dryer.
Ensure vertical orientation for proper valve function during installation.
Replace all included O-rings and seals to maintain system integrity and prevent leaks.
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Warranty Information
