Equipment manufacturers specify that ZERO free water must reach the engine.

Zero water is not realistic. All diesel contains some percentage of water. The most important thing is to keep the water below its saturation point so that it stays dissolved rather than entering your equipment as free water.

Saturation points vary from roughly 50 ppm to 1800 ppm based on temperature and on the petro- diesel/biodiesel ratio. When water content reaches the saturation point, the excess water will fall out as free water. Your diesel may hold 90 ppm dissolved water when warm, but only 60 ppm when it cools down due to colder weather. The 30 ppm difference falls out as free water and settles to the bottom of the tank.

Knowing the water content is important and getting rid of it even more so. (To test fuel see our Fuel Products Page)

Here is how you remove 99.5% of the water:

Complete Plug and Play Systems or We Can
Help You Build Your Own System

Follows are complete systems but if you want the key components contact either our East Cost or West Cost offices.

600 Gallons Per Hour  12 Volt
Model FPS-15 12 volt

A 12 volt portable water removal and fuel polishing system that will remove over 98% of the water and large contamination in fuel with filter-less technology plus 10 micron final filtration filtration.

Complete with battery connectors, dispensing hoses with fueling nozzle and cam lock hose fittings.

400 Gallon Per Hour 120 volt
Low Cost Fuel Polishing
Model FPS-400

Dieselcraft’s FPS-400 is the only low cost, modular system that can be ordered to fit your budget that will remover 99% of the water and large particles in fuel with filter-less technology and then spin-on 10 micron absolute filtration.

The base system consists of a hand truck ready frame holding a Dieselcraft Fuel Purifier, 400 GPH 120 volt pump and 10 micron filter with 20 feet of hose. One can add the hand truck, a magnetic fuel conditioner, a water alarm, digital timer, extra hose or flow meter if desired.

500 Gallons Per Hour Gear Pump Driven Fuel Polishing
Model FPS-8 Diesel Fuel Polishing System

For less than 5000 gallon fuel tanks
Continuous duty.
This unit can run 24/7 with no problem.


  • Turns 500 GPH
  • Dimensions – 19.5 x19.5 x 40 tall”
  • 115/230 single phase 1/3hp motor
  • Weight – 150 lbs.
  • 8.3 GPM Heavy Duty and Continuous Duty gear pump
  • Removes over 95% of water and large contamination in fuel
  • Anti-asphaltene fuel conditioning
  • Absolute particle filtration to 10 microns standard
  • Epoxy powder coated
  • 2 each 10 foot suction and discharge hoses included
  • Digital flow meter
  • Water Sensor

1800 Gallons Per Hour Vane Pump Driven Fuel Polishing
Model FPS-26 Diesel Fuel Polishing System

  • 1800 GPH
  • 115/230 volt single phase 50 or 60 Hz
  • Dimensions – 32 x18 x 47” tall
  • Removes over 99% of water
  • Anti-asphaltene fuel conditioning
  • Absolute particle filtration to10 microns
  • Dual Filtration allows no stopping to
    change filters.
  • Epoxy powder coated.
  • 2 each 25 foot suction and discharge hoses
    included with cam lock fittings.
  • Digital flow meter.
  • Semi-pneumatic tires.
  • Weight 220 lbs.


1980 Gallons Per Hour plus Pressure Washing
Model FPS-PW

There is no other tank cleaning system on the market that compares to Dieselcraft. This tank cleaning system is designed with a high pressure high flow pump and uses a tank cleaning spray nozzle that cleans 360° of all inside tanks surfaces by pumping the fuel at high pressure to remove solids from the tanks walls. No cleaning agents needed in most cases.

Regardless if the tank is above ground in-ground are on board a vehicle this will clean the tank better than any other system available.

  • Transfer Flow Rate 37 GPM
  • Filter Rate 33 GPM
  • Pressure Cleaning Rate 30 GPM @ 75PSI
  • Maximum Tank Diameter 18 Feet
  • Dimensions 37″ wide x 45″ deep x 41″ tall.
  • Particle Filtration to 10 microns standard.
  • Suction and Discharge Hoses Included.
  • 120/220 volt 50-60HZ 1.5 HP
  • Weight 570 lbs.