CARMOCAR R12T Marine Fuel Water Separator — Spin-On Diesel Filter with Clear Bowl, 15 GPH, Includes Fittings

The CARMOCAR R12T marine spin-on fuel water separator is a complete diesel pre-filter assembly that removes free water and debris, offering visible collection and easy draining without disassembly.

Keeping diesel fuel clean is essential for reliable marine engines. This CARMOCAR R12T unit combines a high-flow spin-on filter cartridge with a clear nylon collection bowl, a self-venting drain valve and included fittings and plugs to make installation, inspection and maintenance straightforward aboard small boats and work vessels. It is built to match R12T marine filter housings with 120AT NPT ZG1/4-19 threads and offers a 15 GPH flow rating to support continuous engine operation.

How does this separator protect my diesel engine on a boat?

The separator captures free water and particulate before fuel reaches your engine, reducing injector and pump wear. Its clear bowl makes contaminant levels immediately visible so you can service the unit before problems occur.

• Removes free water and sediment prior to fuel delivery
• Reusable clear nylon bowl for quick visual inspection
• Spin-on cartridge simplifies replacement without special tools
• Rated 15 GPH to maintain steady fuel flow for typical marine engines

How do I drain and maintain the CARMOCAR R12T water separator?

Maintenance is designed to be quick and mess-free: open the self-venting drain valve to discharge collected water and muck, then close the valve to resume normal operation. When the cartridge reaches service life, unscrew the spin-on filter and replace it with a compatible R12T element.

• Open valve to drain; tighten to stop discharge
• Clear bowl shows when draining is needed
• Spin-on cartridge for fast swaps at the dock
• Check fittings and seals during routine inspections

What fittings and thread standards are included for installation?

This package includes two fittings and two plugs tailored for the R12T housing thread specification. The assembly matches 120AT NPT ZG1/4-19 connections commonly found on marine diesel pre-filter mounts, simplifying replacement or retrofitting with minimal plumbing changes.

• Fits R12T marine spin-on housing with 120AT NPT ZG1/4-19
• Two fittings included for inlet/outlet plumbing options
• Two plugs supplied for unused ports or temporary sealing
• Direct bottom outlet enables draining without removing the assembly

What performance can I expect from the R12T model at sea?

The R12T design balances filtration efficiency with the flow demands of most small to mid-size marine diesel engines. By providing a steady 15 gallons-per-hour flow capacity, it helps maintain engine power and responsiveness while removing water that can cause corrosion and injector fouling.

• 15 GPH flow rate suitable for many single-engine craft
• High-performance filter media for reliable contaminant capture
• Durable construction for extended service life in marine environments
• Visible bowl simplifies fuel quality monitoring underway

Who is this product for? If you operate a small to medium-sized diesel-powered boat or service craft and need a dependable, easy-to-check fuel pre-filter, the CARMOCAR R12T assembly is aimed at boat owners, marine mechanics and fleet managers who prioritize straightforward maintenance and visible assurance of fuel condition. It's especially useful when retrofitting existing R12T-style spin-on housings or replacing worn separators with a user-friendly, high-flow option. Always verify thread compatibility and check OEM pictures before purchase; CARMOCAR offers a one-year customer service period for support and questions.