Doc's Diesel Fuel/Water Separator DGF430 for Ram 6.7L Cummins 2019-2024 — 3-micron Filtration, Water Separation

Doc's Diesel DGF430 is a high-efficiency fuel/water separator engineered to remove water and contaminants from diesel, protecting the fuel system on 2019+ Ram 6.7L Cummins trucks.

Designed as a direct-fit replacement for factory and aftermarket part numbers such as Mopar 68436631AA, the DGF430 combines multi-stage filtration media with a focus on durability and consistent fuel flow. This unit targets water, rust, dirt and debris before they reach fuel pumps and injectors, helping maintain engine responsiveness and system longevity when changed at recommended intervals.

How does the DGF430 protect my Cummins fuel system?

The DGF430 captures particulate and separates free water from diesel before contaminants can harm sensitive fuel system components. Its construction emphasizes maximum filtration surface area, allowing effective contaminant retention while preserving flow characteristics important to modern high-pressure systems.

• 3 micron rated media with third-party tested 96.92% efficiency
• Multi-layer filtration to trap fine particles and sediment
• Water separation stage diverts free water away from fuel lines
• Includes o-rings for a reliable seal during installation

Will this part fit my Ram 2500/3500/4500/5500 with the 6.7L Cummins?

The DGF430 is manufactured to be compatible with 2019 through 2024 Ram trucks equipped with the 6.7L Cummins engine. It is designed as a direct interchange with common OEM and aftermarket numbers to simplify replacement and reduce installation guesswork.

• Direct replacement for Mopar 68436631AA
• Interchangeable with Wix WF10579, Baldwin PF46152, Purolator F51542
• Fits 2019–2024 Ram 6.7L Cummins 2500, 3500, 4500, 5500 models
• Form and connections match factory mounting points for easy swap

How often should I change the fuel/water separator?

Replacement intervals depend on driving conditions, diesel quality and manufacturer guidance. As a practical rule, change the separator between 5,000 and 10,000 miles for routine maintenance, with 15,000 miles as a maximum interval unless the vehicle manufacturer specifies otherwise.

• Inspect during each oil or major service interval
• Replace sooner if water is present or fuel contamination is suspected
• Follow your vehicle warranty and maker recommendations first
• Changing regularly helps maintain fuel economy and performance

What performance specifications and testing back the DGF430?

Doc's Diesel subjects this separator to independent testing and designs it to a 3-micron efficiency benchmark while prioritizing flow and contaminant capture. The third-party result shows a 96.92% efficiency rating at the claimed particulate size, indicating strong filtration performance for protecting pumps and injectors.

• Third-party tested: 3 micron @ 96.92% efficiency
• Engineered media layout maximizes usable surface area
• Durable housing to withstand under-hood conditions
• Supplied with seals to ensure leak-free installation

Who is this for: Doc's Diesel DGF430 is aimed at Ram owners and fleet managers who want a reliable, high-efficiency replacement fuel/water separator for 6.7L Cummins-equipped 2019+ 2500–5500 trucks. It suits technicians and DIYers looking for a drop-in interchange with common OEM part numbers, and anyone who wants to minimize the risk of fuel-system damage from water or sediment while preserving proper fuel flow and engine response. Replace per manufacturer or vehicle service guidance to maintain warranty compliance and best results.