Fix Diesel Fuel by Removing the Water.
Equipment manufacturers specify that ZERO free water must reach the engine and as a result you let water enter the engine you now have created a death sentence for at least the injectors and possibly other costly parts. We fix diesel fuel so you are not fixing the engine.
Therefore here is the simple question to ask yourself, am I protecting a $20,000 – $250,000 engine with a $20 paper filter and the OEM water separator?
Because we remove 99% of water and solids to ISO Cleanliness Code of 17/15 with no filter element we fix diesel fuel and you will have fewer fuel related problems at the wrong time.
Before and After Water Removal by Dieselcraft Fuel Purifiers

Because Dieselcraft Purifiers are based on surface tension principle we will out perform the competition. On the other hand some manufactures make wild claims that are impossible to prove.
Most importantly in fuel water separation, the larger the surface area the better. Bad fuel is made clean because Dieselcraft Purifiers are engineered with a proprietary media and a fuel stream for maximum “residence time” based on the fuel flow rate. The longer the purifier the longer the residence time and therefore the better the separation. “Size Does Matter”. All purifiers are supplied with a water sensors and the needed mounting hardware.

bad fuel and the problem is not solved.
Our most popular unit is the 5×16 and does 15 GPM. The direct replacement for the discontinued RCI FP-800.

So before you buy any other “Purifier” ask the manufacture “What is the residence time”. Then ask them to explain the claim of “big results using centrifugal force” because it is a fairy tale. To clarify, there is zero centrifugal force in play!
Therefore if a purifier is not matched to the fuel flow you get nothing but more problems

Based on engine horse power or the pump flow rates we size the Dieselcraft Purifiers.
Contact us for help and prices.


This tank cleaning system is designed to run 24 hours per day 7 days a week mounted next to a storage tank.
This will keep 99.5% of the water and solids out of the tank with NO FILTERS
Purifiers work with GASOLINE.
We do not supply SYSTEMS, pumps and motors, for gasoline.
100 GPM at Fuel Dock in Angola, Africa


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Frequently Asked Questions
A DIESELCRAFT Fuel Purifier removes free water, heavy particulates, and sludge from diesel fuel using a no‑filter, mechanical separation process. Fuel enters the chamber, slows down, and contaminants drop out by gravity and impact. No disposable filter element is used.
DIESELCRAFT purifiers are designed to remove:
• Free water
• Rust flakes
• Scale
• Sludge and microbial mass
• Heavy particulates
They do not remove fine suspended solids or emulsified water. A downstream filter is still required for polishing to micron levels.
No. All FP DIESELCRAFT Fuel Purifiers operate without a filter element. They rely entirely on mechanical separation and our proprietary media.
Drain intervals depend on fuel condition. In clean tanks, draining may be infrequent. In older or contaminated tanks, the bowl may need to be drained more often. All units are supplied with a water sensor to indicate draining is needed
DIESELCRAFT purifiers remove biomass clumps and the water associated with microbial growth, but they do not kill microbes. A biocide treatment is required if active growth is present.


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