The first in-tank fuel filter for diesel trucks, tractors, boats and other moving machines.

  • Keeps inline filters & water separators clear, significantly improving fuel purity to the injectors & engine as well as reducing contamination wash-through.
  • Extends lifespan of fuel system & engine components.
  • Extends lifespan of inline filters & water separators.
  • Captures water before it can damage the tank or feed bacteria-growth. 
  • Stops emulsification of water into fuel during movement & refueling.
  • Reduces stirring of dirt & particles into suction line during & after refueling.
  • Protects tank and fuel from condensation as well as larger water ingress.
  • Improves fuel efficiency and engine output.
  • DQTube uses the same proven technology that has been used with fuel companies for diesel recovery for the last decade.

Along with DQTube Universal for diesel trucks & moving equipment, DQTube also has products for stationary tanks and large fuel storage.

DQTube: Powered by Diesel Quality Technology (DQT)

Diesel Quality Technology ApS
Manufacturer of DQTube


DQTube does not replace inline filters, water separators and many of the additives you currently use.  Rather, it complements and improves filtration effectiveness and efficiency. DQTube is an affordable advanced level of protection to clean fuel, clear the tank and keep the inline filtration system operating at optimal efficiency to assure the engine powers your operation at maximum performance.

DQTube: Powered by Diesel Quality Technology (DQT)

Classic quote from Caterpillar Diesel Fuel System Care: 


“90% of diesel troubles are due to dirt or water in the fuel. For successful operation it is necessary that these impurities be kept out of fuel”.

  • Trucks & Buses
  • Diesel Rental Fleets
  • Excavators & Construction Equipment
  • Tractors & Combines
  • Workboats & Yachts
  • Generators
  • Mining Machines


  • Cranes
  • Boom & Scissor Lifts
  • Other Diesel Machines
  • Storage Tanks, IBCs & Day Tanks
  1. 24/7/365: Leave in the tank during both operation & downtime to constantly capture water & impurities to improve fuel quality, clear the tank environment and prevent moisture from entering the fuel line.
  2. Delivery Control: Use after filling/bunkering to indicate & remove excess water.
  3. Safety/Emergency: Keep on-board for safety at sea or on-site to solve fuel tank water ingress any time it arises.

*Stopping contamination in the fuel tank improves diesel purity and stops up to 90% of water & particles before they enter the fuel line which produces a domino effect of provable benefits.

DQTube has three primary uses:

Innovative Diesel Filtration Technology

The only effective solution to filter fuel directly inside the fuel tank


DQTube is an in-tank diesel filter that captures water, dirt, dust, rust, bacteria and other contaminants directly in the fuel tank. 

DQTube is a simple product that gives diesel operators an important new tool in removing water and dirt in the tank before it can mix into the fuel, create bacteria-growth or rust the tank.  Some operators expect inline filters and separators alone to do this, however, this thinking only leads to more injector, fuel pump and engine repairs as well as more downtime and filter replacements.  If you want your water, you can certainly keep your water, but why not use DQTube and get rid of it before it causes you more problems?

Steve Schultz
DQTube Co-Founder

Cutting corners on filtration is one of the biggest mistakes that I have seen in my 35+ year career in diesel and hydraulics. DQTube will remove more impurities and do it sooner than any other filter that exists. DQTube is a logical solution for diesel operators who want to prevent downtime & reduce repair costs.

Christian Rabøl

Co-Founder of DQTube

DQTube Products Sizes:

DQTube Universal

3.5cm diameter/20cm length

150ml water capture capacity

For all moving diesel equipment &

diesel storage tanks <1200 liters with

larger than 1.5-inch openings

DQTube Pro

4.5cm diameter/30cm length

400ml water capture capacity

For stationary diesel tanks with

2-inch openings

DQTube MT

7cm diameter/45cm length

1500ml water capture capacity

For diesel storage tanks with

3-inch+ openings

DQTube LT

8.5cm diameter/105cm length

5 liter water capture capacity

For diesel storage tanks with

4-inch+ openings

As a heavy equipment dealer, DQTube helps us support our customers to keep their machines running at optimal performance.  We have close relationships with our customers, so anything we can do for them, goes a long way to proving our commitment to their best interests.

Martin Rusevski

Fimaco

Win my decade-plus with both Caterpillar & Cummins it was no secret how much time and money bad fuel had causes our customers.  DQTube is an excellent solution for helping combat the moisture and particles that will naturally get into every fuel tank.

Rudolf Mészáros 

DQTube Distributor

HOW DQTube WORKS:

The proprietary Diesel Quality Technology (DQT) formula inside DQTube captures water quickly & isolates it inside the DQTube as solid gel.  The water will remain captured inside DQTube until it is removed from the tank.

In addition to water, DQTube also captures dirt, dust, rust, bacteria and other particles that get into the tank through the vent or the fill.

Diesel is organic, so naturally it will spoil & grow bacteria.  Keeping moisture out of your tank is the #1 preservation method for stored fuel

If you own a diesel machine, you store diesel fuel. There is no magic forcefield around your tank, you must maintain the fuel constantly for optimal operation, or you will pay.

Keeping inline filters clear by allowing DQTube to take the heavy burden is the #1 most effective way to assure pure fuel to the injectors & engine.


DQTube reduces in-line filter changes and the need for all biocides and some fuel additives.

DQTube is an everyday, leave-in, in-tank filter for diesel tanks that has value for every diesel tank, everywhere in the world.

If it were up to me, I would spend zero money on anything, but the reality is that fuel contamination is not a fairy tale. When you get into the diesel machine business, you take on the responsibility of fuel storage, even when storing that fuel is in a truck, tractor or other type of machine. Do yourself a favor and take advantage a product like DQTube whose benefits far outweighs its cost.

Ziad Ayob

President of Africa2B

DQTube provides a legitimate filtration improvement for all diesel tanks without the need for tools or complicated installation. Whether bad fuel or good fuel, DQTube is a winner for every diesel tank at all times.

Jock Sutherland

Pitt Panther Diesel

The design of DQTube maximizes its ability to capture & hold water as well as particles and to completely remove them from the diesel fuel and the fuel tank.

DQTube is designed to work with any accessible diesel tank anywhere in the world.  Chose the size that fits your tank opening and let DQTube optimize your fuel and maximize your performance.

About us:

Our philosophy is to eliminate things that make problems. If we prevent problems and inefficiencies, we have less to fix and we operate much better.  To that, If we remove water and particles at the source (the fuel tank), before it goes into the fuel system; we can make a significant % of wear, filter changes and common diesel problems not happen. This is true for normal, everyday fuel contamination that wears equipment & blocks filters but also for big problems that break equipment and budgets.

As DQTube Engineering Director says, “We never have to fix the problems that never happen. In my career working with the marine industry, the Danish Navy and other diesel operations; I have always sought preventative solutions because it is most cost-effective, it keeps equipment running at optimal performance and makes sure downtime does not interrupt business.”

Our solutions target the source of problems; which is the fuel tank. The fuel tank is where delivery is taken, where fuel is stored, where contamination accumulates and where problems develop.  The fuel tank is also the first place for operators to control their operational outcomes. DQTube gives diesel operators the power to fix delivery inconsistencies, improve their fuel quality and protect their tanks from condensation, water-ingress, corrosion and bacteria-growth. DQTube also reduces the need for fuel polishing, fuel additives, biocides & other “fuel medicines” that have damaging side-effects.

See more about our industrial solutions at www.dieselqt.com

This technology was first used to remove water from off-spec diesel and return it to EN590 standard.  DQT is currently used with fuel companies to recover off-spec diesel for retail sale as well as for fuel storage management.