Description
R12T Fuel Filter Base — NPT ZG1/4-19 Threaded Head for 120AT / S3240
Product Overview
The iFJF R12T Fuel Filter Base is a precision-machined aluminum filter head designed as a direct replacement for Racor 120AT and S3240 series fuel water separator assemblies. Featuring standard NPT ZG1/4-19 threaded inlet and outlet ports, this base accepts all 120AT-style spin-on filter elements. The kit includes two brass NPT fittings and two port plugs, giving you flexibility to configure the plumbing for your specific installation layout.
Whether replacing a corroded original filter head on your marine diesel setup or building a custom fuel filtration system, the R12T base provides a solid, leak-free foundation. The anodized aluminum construction resists corrosion from diesel fuel, biodiesel blends, and saltwater marine environments.
Key Features
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Anodized Aluminum Construction: Premium 6061 aluminum with anodized finish resists corrosion and pitting — far more durable than raw cast alternatives.
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Standard NPT ZG1/4-19 Ports: Matches the most common marine and industrial diesel fuel line fittings without adapters.
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Includes Fittings & Plugs: Two brass NPT adapters plus two port plugs for flexible plumbing configuration.
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Universal 120AT Compatibility: Accepts all standard 120AT and S3240 spin-on filter elements from any manufacturer.
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Pre-Drilled Mounting Holes: Easy bolt-on installation to bulkheads, stringers, or custom mounting brackets.
Compatibility
| Filter Series |
Element Type |
Micron Options |
| Racor 120AT |
Spin-On |
2, 10, 30 Micron |
| Racor S3240 |
Spin-On |
10 Micron |
| iFJF R12T |
Spin-On |
10 Micron |
| Sierra 18-7947 |
Spin-On |
10 Micron |
Specifications
| Specification |
Value |
| Port Thread |
NPT ZG1/4-19 (Inlet & Outlet) |
| Material |
Anodized 6061 Aluminum |
| Compatible Elements |
120AT, S3240, R12T, Sierra 18-7947 |
| Kit Includes |
Filter Base + 2 Brass Fittings + 2 Plugs |
| Max Operating Pressure |
15 PSI (Suction Side Application) |
Frequently Asked Questions
Q: Does this base come with a filter element?
A: No, this is the filter head/base only. It accepts all standard 120AT and S3240 spin-on filter elements, available separately.
Q: What thread are the ports?
A: Standard NPT ZG1/4-19 — the industry-standard size for marine and industrial diesel fuel filtration systems.
Q: Can I mount this on a boat?
A: Yes. The anodized aluminum is corrosion-resistant and suitable for marine engine compartments when mounted in a dry, ventilated area.
Q: Does it fit the Racor drain bowl?
A: Yes. The R12T base accepts the standard Racor-style clear nylon water collection bowl (sold separately or as part of our combo kit).
Q: What's the difference between this and the combo kit?
A: This is the filter head/base only. Our combo kit (sold separately) includes the head, element, bowl, and all fittings for a complete drop-in installation.
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