DOC'S Diesel Fuel/Water Separator for Ram 6.7L Cummins (2019–2022) – Replaces 68436631AA | OEM Grade
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Description
xKeep your Ram 6.7L Cummins fuel system clean
Doc's Diesel Fuel/Water Separator for the Ram 6.7L Cummins is engineered to keep moisture out of the fuel line and to trap dirt, rust, and debris before they reach critical components. In everyday driving, you may notice steadier fuel delivery and smoother starts as the fuel path stays clear, whether you’re maneuvering through city traffic or cruising on the highway.
Designed to maximize the surface area of its filtration media, this unit works with an included o ring set to seal the housing securely. The result is a compact, OEM grade filter that slides into your existing fuel system with a direct replacement path and predictable fitment.
What to expect from this separator
- Water separation from fuel plus filtration of common contaminants helps protect fuel system parts.
- Maximized filtration media surface area supports consistent filtration performance over time.
- 3 micron filtration rated at 96.92% efficiency, third‑party tested for reliability.
- O rings are included for a complete, leak‑resistant seal during installation.
Interchangeability and compatibility
This unit replaces Mopar 68436631AA and works as a direct swap for multiple brands, offering a flexible upgrade path. It also aligns with a broad interchange including Wix, Baldwin, Premium Guard, and Purolator lines.
- Interchanges: Mopar 68436631AA, Wix WF10579, Baldwin PF46152, Premium Guard DF99569, Purolator F51543.
- Fitment: 2019–2022 Ram 6.7L Cummins 2500, 3500, 4500, 5501 trucks.
Installation and replacement guidance
For best results, follow your vehicle manufacturer warranty and replacement guidelines. Common practice suggests changing the separator every 5,000 to 10,000 miles, with a maximum interval of 15,000 miles between changes depending on use and fuel quality.
Why choose this OEM grade separator
Choosing an OEM grade fuel/water separator balances filtration efficiency with ease of use. It supports reliable fuel delivery and can contribute to smoother operation under varying driving conditions. Benefits are possibilities, not guarantees, and will depend on vehicle condition and driving patterns.
FAQ
Q: Which Ram models is this fuel/water separator compatible with?
A: Compatible with 2019–2022 Ram 6.7L Cummins 2500, 3500, 4500, and 5501.
Q: How often should I replace the separator?
A: Follow your vehicle warranty; typical replacement every 5,000–10,000 miles, up to 15,000 miles maximum.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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