{"product_id":"professional-inline-air-compressor-filter-150-psi-oil-water-separator-with-auto-drain-zn312","title":"Professional Inline Air Compressor Filter - 150 PSI Oil \u0026 Water Separator with Auto Drain (ZN312)","description":"\u003cdiv class=\"product-summary-tldr\" style=\"margin-bottom:20px;padding:16px;background:#f0fdf4;border-left:4px solid #16a34a;border-radius:0 8px 8px 0;\"\u003e\n\u003cp style=\"margin:0 0 8px 0;font-weight:600;color:#15803d;\"\u003eProduct Summary\u003c\/p\u003e\n\u003cp style=\"margin:0 0 8px 0;\"\u003eThe Le Lematec ZN312 is a 150 PSI inline air compressor filter with automatic drain. Removes oil, water, and particulates from compressed air lines. Clear bowl for visual inspection. 1\/4\" NPT connections. Price: ~$17. Factory direct from Le Lematec.\u003c\/p\u003e\n\u003cp style=\"margin:0;font-style:italic;color:#166534;\"\u003eBest for: Basic compressed air filtration — install before your spray gun or air tool to protect against moisture and oil contamination.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 id=\"tinymce_scroll_sign\"\u003eInline Air Compressor Filter for Optimal Performance\u003c\/h2\u003e\n\u003cp class=\"whitespace-pre-wrap break-words\"\u003eTransform your compressed air quality with the ZN312 Professional Inline Filter. This high-performance separator features a 1-micron reusable filter, push-button drain valve, and broad 2-150 PSI operating range. Built with premium zinc construction and one-way safety valve, it's the perfect solution for protecting your air tools and ensuring optimal performance.\u003c\/p\u003e\n\u003cp class=\"whitespace-pre-wrap break-words\"\u003e\u003cstrong\u003eKey Features \u0026amp; Benefits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-disc space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e\n\u003cstrong\u003eSuperior Filtration:\u003c\/strong\u003e 1-micron filter removes oil and water contaminants\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e\n\u003cstrong\u003eQuick Maintenance:\u003c\/strong\u003e Push-button drain valve for easy service\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e\n\u003cstrong\u003eSafety Design:\u003c\/strong\u003e One-way valve prevents dangerous backflow\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e\n\u003cstrong\u003eVersatile Range:\u003c\/strong\u003e Operates from 2-150 PSI for all applications\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e\n\u003cstrong\u003ePremium Build:\u003c\/strong\u003e Zinc construction with steel drain valve\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e\n\u003cstrong\u003eUniversal Fit:\u003c\/strong\u003e Standard ¼\" NPT connections\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e\n\u003cstrong\u003eTool Protection:\u003c\/strong\u003e Extends air tool life and performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"whitespace-pre-wrap break-words\"\u003e\u003cstrong\u003eTechnical Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"-mt-1 [li\u0026gt;\u0026amp;]:mt-2 list-disc space-y-2 pl-8\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eOperating Pressure: 2-150 PSI (90 PSI optimal)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eFilter Type: 1-micron reusable\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eMaterial: Zinc body, steel valve\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eConnection: ¼\" NPT\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eFeatures: Push-button drain, one-way valve\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"whitespace-pre-wrap break-words\"\u003eEssential for spray painting, sandblasting, and pneumatic tools. Ensure clean, dry air delivery - Add to Cart now to protect your air system investment.\u003c\/p\u003e\n\u003cp class=\"whitespace-pre-wrap break-words\"\u003e\u003cstrong\u003eProfessional Performance Guarantee:\u003c\/strong\u003e Workshop-tested for reliable contamination removal.\u003c\/p\u003e\n\u003ch3\u003eExceptional Filtration Capabilities\u003c\/h3\u003e\n\u003cp\u003eThe Inline Air Compressor Filter is designed specifically to remove oil and water from compressed air systems. It operates effectively at pressures up to 150 PSI, ensuring that your air tools remain clean and efficient. By using this filter, you can prevent moisture from entering your air compressor, which can lead to rust and damage. This is crucial for maintaining the longevity of your equipment and enhancing the performance of your tools.\u003c\/p\u003e\n\u003ch3\u003eInnovative Auto Drain Feature\u003c\/h3\u003e\n\u003cp\u003eOne significant advantage of the Inline Air Compressor Filter is its automatic drainage system. This feature automatically expels accumulated water without any manual intervention. Therefore, it saves you time and ensures that the filter operates optimally without clogging. Regular maintenance is reduced because the filter constantly drains excess moisture, allowing you to focus on your work instead.\u003c\/p\u003e\n\u003ch3\u003eEasy Installation and Maintenance\u003c\/h3\u003e\n\u003cp\u003eThe Inline Air Compressor Filter is designed for easy installation, making it a practical choice for both professionals and DIY enthusiasts. It connects seamlessly into your existing air compressor system, ensuring minimal downtime. Maintenance is straightforward; check filters regularly and replace them as needed to ensure consistent air quality. Because of its user-friendly design, you can maintain your air compressor system without a hassle.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I drain the water separator?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Drain the ZN312 before each use session and during extended operation in humid conditions. The transparent bowl lets you visually monitor moisture accumulation. In high-humidity environments, you may need to drain every 1-2 hours of continuous use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What's the difference between the ZN312 and the ZN312E-3?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The ZN312 is a standard inline filter with oil\/water separation and auto drain. The ZN312E-3 adds a desiccant filter stage that absorbs moisture vapor — providing much drier air than mechanical separation alone. Choose the ZN312E-3 for spray painting and moisture-sensitive applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I install multiple filters in series?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes, installing filters in series improves air quality progressively. A common setup is: ZN312 first (removes bulk water and large particles), followed by a desiccant dryer (ZN312E-3 or ZN312-D-C1) for ultra-dry air. This two-stage approach extends desiccant life significantly.\u003c\/p\u003e\n\n\u003cdiv class=\"enhanced-features\" style=\"margin-top:20px;\"\u003e\n\u003ch3 style=\"color:#0f172a;font-size:1.1em;\"\u003eWhy Professionals Choose This Tool\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;\"\u003e\n\u003cli style=\"margin-bottom:8px;\"\u003e\n\u003cstrong\u003eAuto-Drain Design:\u003c\/strong\u003e Automatically expels collected water — no manual draining required\u003c\/li\u003e\n\u003cli style=\"margin-bottom:8px;\"\u003e\n\u003cstrong\u003eOil \u0026amp; Water Separation:\u003c\/strong\u003e Centrifugal element removes both oil mist and water droplets from compressed air\u003c\/li\u003e\n\u003cli style=\"margin-bottom:8px;\"\u003e\n\u003cstrong\u003e150 PSI Rating:\u003c\/strong\u003e Handles standard industrial and home compressor output\u003c\/li\u003e\n\u003cli style=\"margin-bottom:8px;\"\u003e\n\u003cstrong\u003eTransparent Bowl:\u003c\/strong\u003e Visual inspection of contamination level without disassembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"whats-in-box\" style=\"margin-top:25px;padding:18px;background:#fefce8;border:1px solid #eab308;border-radius:10px;\"\u003e\n\u003ch3 style=\"margin-top:0;color:#a16207;font-size:1.1em;\"\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli style=\"margin-bottom:4px;color:#78350f;\"\u003eZN312 inline air filter\u003c\/li\u003e\n\u003cli style=\"margin-bottom:4px;color:#78350f;\"\u003eAutomatic drain mechanism\u003c\/li\u003e\n\u003cli style=\"margin-bottom:4px;color:#78350f;\"\u003eMounting bracket\u003c\/li\u003e\n\u003cli style=\"margin-bottom:4px;color:#78350f;\"\u003e1\/4\" NPT fittings\u003c\/li\u003e\n\u003cli style=\"margin-bottom:4px;color:#78350f;\"\u003eUser manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"compatible-with\" style=\"margin-top:20px;padding:18px;background:#eff6ff;border:1px solid #3b82f6;border-radius:10px;\"\u003e\n\u003ch3 style=\"margin-top:0;color:#1d4ed8;font-size:1.1em;\"\u003eCompatible With\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 12px 6px 0;font-weight:600;color:#1e40af;vertical-align:top;white-space:nowrap;\"\u003eAir Compressors\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;color:#1e3a5f;\"\u003eAny compressor up to 150 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 12px 6px 0;font-weight:600;color:#1e40af;vertical-align:top;white-space:nowrap;\"\u003eInstallation\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;color:#1e3a5f;\"\u003eInline in any 1\/4\" NPT air line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 12px 6px 0;font-weight:600;color:#1e40af;vertical-align:top;white-space:nowrap;\"\u003eAir Tools\u003c\/td\u003e\n\u003ctd style=\"padding:6px 0;color:#1e3a5f;\"\u003eProtects all downstream tools from moisture and particulates\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"use-cases\" style=\"margin-top:15px;padding:12px;background:#f0fdf4;border-radius:8px;\"\u003e\u003cp style=\"margin:0;font-size:0.95em;\"\u003e\u003cstrong\u003eIdeal Applications:\u003c\/strong\u003e permanent air line installation, set-and-forget filtration, shop air protection, moisture removal, oil separation\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"extra-faqs\" style=\"margin-top:20px;\"\u003e\n\u003cdiv class=\"faq-item\" style=\"margin-bottom:15px;\"\u003e\n\u003ch4 style=\"margin-bottom:5px;color:#1e293b;\"\u003eWhat is the difference between the ZN312 and AI303?\u003c\/h4\u003e\n\u003cp style=\"margin:0;color:#475569;\"\u003eBoth are 1\/4\" NPT inline filters at 150 PSI. The ZN312 features automatic draining and is designed for set-and-forget installation. The AI303 has manual drain and is slightly more compact. Choose the ZN312 for permanent installation; choose the AI303 for portable or temporary setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\" style=\"margin-bottom:15px;\"\u003e\n\u003ch4 style=\"margin-bottom:5px;color:#1e293b;\"\u003eHow effective is the auto-drain feature?\u003c\/h4\u003e\n\u003cp style=\"margin:0;color:#475569;\"\u003eThe auto-drain activates when accumulated water reaches a threshold level. It works well for continuous-use environments. In light-use shops, you may still want to manually check periodically, especially in humid conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\" style=\"margin-bottom:15px;\"\u003e\n\u003ch4 style=\"margin-bottom:5px;color:#1e293b;\"\u003eIs this the same as an air compressor moisture trap?\u003c\/h4\u003e\n\u003cp style=\"margin:0;color:#475569;\"\u003eYes, the ZN312 functions as both a moisture trap and oil separator for air compressors. It traps condensed water (moisture) and oil mist from your compressed air line before they reach your tools. The auto-drain feature means trapped moisture is released automatically, unlike basic moisture traps that require manual draining.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"How often should I drain the water separator?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Drain the ZN312 before each use session and during extended operation in humid conditions. The transparent bowl lets you visually monitor moisture accumulation. In high-humidity environments, you may need to drain every 1-2 hours of continuous use.\"}}, {\"@type\": \"Question\", \"name\": \"What's the difference between the ZN312 and the ZN312E-3?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The ZN312 is a standard inline filter with oil\/water separation and auto drain. The ZN312E-3 adds a desiccant filter stage that absorbs moisture vapor \\u2014 providing much drier air than mechanical separation alone. Choose the ZN312E-3 for spray painting and moisture-sensitive applications.\"}}, {\"@type\": \"Question\", \"name\": \"Can I install multiple filters in series?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, installing filters in series improves air quality progressively. A common setup is: ZN312 first (removes bulk water and large particles), followed by a desiccant dryer (ZN312E-3 or ZN312-D-C1) for ultra-dry air. This two-stage approach extends desiccant life significantly.\"}}, {\"@type\": \"Question\", \"name\": \"What is the difference between the ZN312 and AI303?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Both are 1\/4\\\" NPT inline filters at 150 PSI. The ZN312 features automatic draining and is designed for set-and-forget installation. The AI303 has manual drain and is slightly more compact. Choose the ZN312 for permanent installation; choose the AI303 for portable or temporary setups.\"}}, {\"@type\": \"Question\", \"name\": \"How effective is the auto-drain feature?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The auto-drain activates when accumulated water reaches a threshold level. It works well for continuous-use environments. In light-use shops, you may still want to manually check periodically, especially in humid conditions.\"}}, {\"@type\": \"Question\", \"name\": \"Is this the same as an air compressor moisture trap?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, the ZN312 functions as both a moisture trap and oil separator for air compressors. It traps condensed water (moisture) and oil mist from your compressed air line before they reach your tools. The auto-drain feature means trapped moisture is released automatically, unlike basic moisture traps that require manual draining.\"}}]}\n\u003c\/script\u003e\n\u003ch3\u003eRelated Guides \u0026amp; Resources\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/news\/frl-filter-regulator-lubricator-guide\"\u003eComplete FRL Unit Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/news\/pneumatic-tool-maintenance-care-guide\"\u003ePneumatic Tool Maintenance Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/news\/air-compressor-accessories-buying-guide\"\u003eAir Compressor Accessories Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"related-products-links\" style=\"margin-top:20px;padding:15px;background:#f8f9fa;border-radius:8px;\"\u003e\n\u003ch3\u003eRelated Categories\u003c\/h3\u003e\n\u003cul style=\"list-style:none;padding:0;\"\u003e\n\u003cli style=\"margin-bottom:8px;\"\u003e\u003ca href=\"\/collections\/filters\" style=\"color:#2563eb;text-decoration:none;\"\u003e→ Air Filters\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin-bottom:8px;\"\u003e\u003ca href=\"\/collections\/regulators\" style=\"color:#2563eb;text-decoration:none;\"\u003e→ Air Regulators\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin-bottom:8px;\"\u003e\u003ca href=\"\/collections\/air-tools\" style=\"color:#2563eb;text-decoration:none;\"\u003e→ All Air Tools\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch3\u003eRelated Resources\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/news\/frl-filter-regulator-lubricator-guide\"\u003eComplete FRL Guide: Filter, Regulator \u0026amp; Lubricator\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/news\/how-to-stop-water-in-air-lines\"\u003eHow to Stop Water in Air Lines\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/news\/inline-air-dryer-for-compressor\"\u003eDo You Need an Inline Air Dryer?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/filters\"\u003eShop All Air Filters\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/air-dryers\"\u003eAir Dryers \u0026amp; Desiccant Filters\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Pro Air Tools","offers":[{"title":"Default Title","offer_id":48652062916865,"sku":"7L-5C1I-1QUV","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/8920\/4481\/files\/le-lematec-zn312-air-dryer-compressor-water-separator-hero_webp.jpg?v=1776896916","url":"https:\/\/amindustrialauto.com\/products\/professional-inline-air-compressor-filter-150-psi-oil-water-separator-with-auto-drain-zn312","provider":"AM Industrial Auto Parts and Tools LLC","version":"1.0","type":"link"}