Professional Inline Air Filter System - 150 PSI Aluminum Oil & Water Separator with Drain (AI303)

Quick Facts 2-150 PSI1-micron filter1/4" NPTAluminum + brassPush-button drainLe Lematec12-mo guarantee Best for: Protecting air tools and spray guns from moisture, oil, and dirt. Essential point-of-use filtration for any compressed-air system. Product Summary The Le Lematec AI303 is a 150 PSI inline air filter that removes oil, water, and dirt from compressed air. Aluminum construction with auto-drain and visual inspection bowl. 1/4" NPT connections. Price: ~$17. Factory direct from Le Lematec. Best for: Protecting air tools and spray guns from moisture damage. Essential for any compressed air system. Experience Superior Filtration with the Inline Air Filter Protect your air tools with the AI303 Professional Inline Filter System. This premium separator combines a 1-micron reusable filter, one-way safety valve, and push-button drain in a durable aluminum body with brass fittings. Designed for workshops demanding clean, dry air and reliable contamination removal across a 2-150 PSI range. Key Features & Benefits: Maximum Filtration: 1-micron filter removes 99.9% of contaminants Premium Construction: Aluminum body with solid brass fittings Easy Maintenance: Quick-action push-button drain valve Safety Design: One-way valve prevents tool damage Versatile Range: Operates from 2-150 PSI (90 PSI optimal) Universal Fit: ¼" NPT male/female connections American Quality: Not made in China - engineered for reliability Technical Specifications: Operating Pressure: 2-150 PSI Filter Rating: 1 micron Construction: Aluminum body, brass fittings Connections: ¼" NPT Features: Push-button drain, backflow protection Ideal for spray systems, plasma cutters, and air suspension. Experience professional-grade air quality - Add to Cart now to protect your equipment investment. Professional Performance Guarantee: Workshop-proven and trusted by automotive professionals. Optimize Your Compressed Air System The inline air filter system is essential for maintaining clean and dry compressed air. Using advanced filtering technology, it traps harmful contaminants such as moisture and oil, ensuring your equipment operates efficiently. As a result, your air tools and machinery function better, which leads to increased productivity. This filter is perfect for various industries, including automotive repair and woodworking. Durability and Reliability Constructed from high-quality aluminum, this inline air filter is designed to withstand pressures up to 150 PSI. Its robust build ensures long-lasting performance, even in demanding environments. Plus, with a built-in drain, you can easily remove accumulated moisture without interrupting your workflow. Consequently, you spend less time maintaining your equipment and more time focusing on your projects. Simple Installation and Maintenance Installation of this air filter is straightforward, making it accessible for users of all skill levels. Just connect it to your existing system, and you're ready to go! Moreover, maintenance is a breeze—regularly check the filter and drain it as needed to keep your air supply clean. This simplicity not only saves you time but also ensures your air compressor system remains free from potential issues caused by contaminants. Frequently Asked Questions Q: How often should I replace the inline air filter element? A: The AI303 uses a reusable 1-micron filter element. Clean it every 200-300 hours of use by rinsing with warm soapy water and allowing it to fully dry. Replace only when the filter shows visible damage or reduced airflow. Q: Can I use the AI303 with a plasma cutter? A: Yes, the AI303 is excellent for plasma cutting applications. Its 1-micron filtration removes moisture and oil that can contaminate the plasma arc, resulting in cleaner cuts and longer consumable life. Q: What's the difference between the AI303, AI303-R1, and AI303-R2? A: The AI303 is a standalone filter/separator. The AI303-R1 adds an integrated pressure regulator with analog gauge. The AI303-R2 adds a digital pressure regulator with LCD display. Choose based on whether you need filtration only or filtration plus pressure control. Why Professionals Choose This Tool Triple Filtration: Removes water, oil, and dirt particles in a single pass — comprehensive air cleaning Aluminum Body: Lightweight corrosion-resistant construction for long service life Compact Size: Small footprint for installation in tight spaces or portable setups Manual Drain: Quick-twist drain valve for fast water removal between jobs What's in the Box AI303 inline air filter Filter element Manual drain valve 1/4" NPT fittings Mounting bracket User manual Compatible With Air Compressors Any compressor up to 150 PSI Air Lines Standard 1/4" NPT air hose systems Air Tools All pneumatic tools, spray guns, sanders, impact wrenches Ideal Applications: general air filtration, portable shop use, moisture and oil removal, tool protection, point-of-use filtering How often should I replace the filter element? Under normal use, replace the filter element every 6-12 months or when you notice reduced airflow. In dusty or high-humidity environments, check monthly. A dirty filter restricts airflow and reduces tool performance. Can I install multiple filters in series? Yes. Professional setups often use a water separator first (AI303), then a desiccant dryer (ZN312-D) for maximum air quality. Each stage removes different contaminants for progressively cleaner air. How does this air compressor separator filter work? The AI303 separator filter uses a centrifugal separation process combined with a 5-micron filter element. Compressed air enters and spins through the chamber, separating heavier oil and water droplets from the air stream. The remaining particles are caught by the filter element. Clean, dry air exits to your tools while contaminants collect in the drain bowl below. Related Guides & Resources Complete FRL Unit Guide Air Compressor Accessories Buying Guide Pneumatic Tool Maintenance Guide Related Categories → Air Filters → Air Regulators → All Air Tools Related Products & Guides You might also like Air Compressor Filter Regulator Combo (1/2" NPT) Analog Air Compressor Regulator Digital Air Pressure Regulator Related guides How to Set Up an FRL System Pneumatic Tool CFM & PSI Chart Air Compressor Fittings Guide