Check Valve - 3/8" FNPT - SMC # NAK4000-N03

The Air Lift Performance 22664 Check Valve is a critical component designed to maintain consistent air pressure and prevent backflow in air suspension systems. By allowing air to flow in only one direction, it protects compressors and ensures stable system performance—ideal for both performance builds and daily-driven air ride setups.

Key Technical Features:

• 3/8" FNPT female thread ports for standard air suspension plumbing
• High-quality SMC check valve (NAK4000-N03) for proven reliability
• Designed to prevent backflow, protecting compressors and system components
• One-way airflow operation for consistent pressure retention
• Durable brass / industrial-grade construction for long service life
• Sold individually (qty. 1 valve)

Compatibility & Fitment:

• Universal fit for air suspension and onboard air systems
• Compatible with 3/8" airline setups and FNPT plumbing
• Ideal for Air Lift Performance systems (3P, 3H, and manual setups)
• Commonly used between compressor and air tank to prevent pressure loss
• Suitable for custom air ride builds and replacement applications

Why Choose This:
Engineered by Air Lift Performance and built with trusted SMC technology, this check valve ensures reliable airflow control, protecting your system and maintaining consistent performance under demanding conditions.