R12T FUEL FILTER WATER SEPARATOR 120AT NPT DIESEL ENGINE | IFJF

iFJF part No.: FJ-FE-R12T. R12T Fuel Filter Water Separator 120AT NPT ZG1/4-19 Diesel Engine Fuel Filtration Product Overview The iFJF R12T Fuel Filter Water Separator is a complete, ready-to-install fuel filtration unit featuring the R12T aluminum filter head, a 10-micron 120AT-style spin-on filter element, and a clear nylon water collection bowl. Designed with standard NPT ZG1/4-19 inlet and outlet ports, this assembly provides primary fuel filtration and water separation for diesel engines in marine, automotive, and industrial applications. This unit protects your engine's fuel system by removing both solid contaminants down to 10 microns and emulsified water that can cause injector damage, corrosion, and microbial growth in diesel fuel. The transparent collection bowl with integrated drain valve makes routine water inspection and draining quick and mess-free. Key Features Complete Assembly: Filter head, 120AT spin-on element, and clear water bowl pre-assembled ready to plumb and mount. 10-Micron Filtration Efficiency: Removes 99% of solid particles 10 microns, protecting high-pressure fuel injection systems. Clear Bowl Water Detection: Visual water monitoring without disassembly drain via bottom petcock valve. NPT ZG1/4-19 Ports: Industry-standard thread size for marine and industrial diesel fuel lines. Corrosion-Resistant: Anodized aluminum head and chemical-resistant nylon bowl for long service life. Specifications Specification Value Filter Micron Rating 10 Micron (Nominal) Flow Rate 15 GPH (57 LPH) Port Thread NPT ZG1/4-19 Head Material Anodized Aluminum Bowl Material Clear Nylon Applications Diesel Marine, Industrial, Generator, Automotive Frequently Asked Questions Q: Does this unit come with mounting hardware? A: The filter head has pre-drilled mounting holes. Mounting bolts/screws are not included as sizes vary by installation surface use stainless steel hardware for marine applications. Q: What's the replacement element part number? A: This unit uses 120AT / S3240 style spin-on elements. Replacement R12T elements are available on our store. Q: Can this be used as a primary filter? A: Yes. This is designed as a primary (suction-side) fuel filter/water separator for engines up to approximately 150 HP. Q: Is it suitable for saltwater marine environments? A: Yes. The anodized aluminum head resists salt spray corrosion. Mount in a dry, ventilated compartment for best longevity. Q: How do I prime this filter after installation? A: Fill the new filter element with clean diesel fuel before spinning it on. Then use your engine's manual primer pump or crank in short bursts until fuel flows. Related Products & Guides Complete Your Fuel System: R12T Combo Kit ($29.99) Our best-selling complete kit R12T Replacement Filter Element ($17.99) Spare 10-micron cartridge R12T Filter Base / Head Only ($17.99) Just need the aluminum head? R12T Clear Nylon Collection Bowl ($13.99) Replacement drain bowl R12H Marine Aluminum Combo ($49.99) Upgrade to marine-grade R12H Replacement Filter Element (from $13.99) For R12H owners Related Guides: R12T vs R12H Real Customer Review (20K+ Views) R12T Installation Guide Step-by-Step Best Water Separator Fuel Filter Buying Guide 2026 R12T Marine Installation Guide: NPT & ZG Fittings