The Veeder-Root HydrX Fuel Conditioning System combats in-tank corrosion by providing continuous water removal within diesel underground storage tanks. HydrX unique design removes water from the lowest point in the tank, preventing water from stagnating on the tank bottom and breeding microbial contaminants. The integrated filtration removes entrained water, rust, sand, and microbial particulate from the fuel, polishing it before returning clean fuel back to the tank.

Keep your fuel within specification and maintain equipment at peak efficiency to avoid unplanned site shutdowns.


Micro-biologically Influenced Corrosion, caused by growing microbes in water, has been a persistent issue that causes fuel degradation and premature equipment breakdown. Water contamination is the chief enemy of diesel storage. Stagnant water on tank bottoms is the breeding ground for microbial activity, which leads to the production of corrosive acids and microbial waste. Continuous water removal is the only long-term, sustainable solution for optimal tank health and diesel fuel quality.

Treating with Tank Cleaning vs HydrX Fuel Conditioning System

Continuous Conditioning Combats Microbial Contamination

  • Removes standing and entrained water from the storage environment that may enter from delivery, flooded spill buckets, condensation, or leaky seals.
  • Removes rust, sand, and microbial particulate down to 25 microns from the fuel.
  • Intelligent operation includes options for scheduling during quiet periods and deliveries, auto-hibernation mode when ideal conditions are reached.

Benefits of a Fuel Conditioner for Diesel Operations

  • Lowers operations costs with the elimination of emergency tank cleanings and fuel polishing.
  • Improves safety and serviceability of tank equipment by removing water that is a leading cause of corrosion.
  • Increases flow rate at the dispenser, as the restriction from clogged filters would be eliminated with a well-maintained tank. Site operators can expect less frequent dispenser filter changes.
  • Continuous cleaning action ensures persistent conditions such as biofilms are mitigated.

How it Works

  1. The Water Intake Device (WID)* is inserted through a spare bung in the Submersible Turbine Pump (STP) sump, which rests on the tank bottom to access water from the lowest point in the tank.
  2. The WID is a multi-mode device powered by the STP to collect water from the bottom of the tank and entrained in the fuel, delivering it to the Fuel Conditioner in the sump. Fuel and water are separated through filtering, and the water kept in the containment vessel.
  3. Separation and filtration purifies the fuel before returning it to the tank.
  4. The TLS-450PLUS Automatic Tank Gauge (ATG) allows the user to see the water level real-time and alerts when the water containment vessel is full.
  5. When the water containment vessel is full, the system will automatically shutdown until the water is removed from the containment vessel.
  6. To remove the water, a site technician would quick-connect to the water containment vessel and drain water into a separate container for disposal.

* Patent pending

Learn more about the HydrX System Components

System Requirements

The unique design of the HydrX Fuel Conditioning System removes water from the lowest point in the tank, preventing water from stagnating on the tank bottom and breeding microbial contaminants. The components of the HydrX System are customized based on the unique configuration of each Diesel underground storage tank.

Review the System Requirements

Site Inspection Guide

The components of the HydrX Fuel Conditioning System are customized based on the unique configuration of each Diesel UST. In order to optimize the functionality of the Water Intake Device that accesses water from the lowest point in the tank, a completed Site Inspection Guide must be submitted to Veeder-Root Customer Service at prior to ordering

Download the Guide

Frequently Asked Questions

Do I need a new site to be able to install the HydrX™ Fuel Conditioning System?

  • No, the Fuel Conditioner is designed to install in most existing sumps. There is a list of sump criteria, including minimum height and diameter, and one spare bung for exchanging fluids. The system will also require minimal wiring for operation and monitoring that will route between the Submersible Turbine Pump (STP) sump and the Automatic Tank Gauge (ATG).

How does the Fuel Conditioning System deal with tank tilt?

  • The sweep operation mode creates a liquid sweeping motion along the length of the tank floor, which pushes water to the lowest point in the tank. Vacuum mode is then activated, where it will easily pull and filter the water through the Fuel Conditioner.

How often will filters need to be changed?

  • The filters have been engineered for optimal life; however, filter life is directly correlated to the amount of sediment and water in the tank and will vary by site. Typical installations are expected to require one to two filter changes annually. The Fuel Conditioning System will monitor and display anticipated filter life, making maintenance schedules predictable.

What do I do with the removed water?

  • The wastewater should be added to your oil-water collection system at the site.

Can this system cover multiple underground storage tanks that are manifolded together?

  • No, manifolded tanks and manifolded STPs are not supported at this time.

Will the Fuel Conditioning System operate in freezing conditions?

  • Yes, if the pump can recirculate fluid daily, the system will allow for operation in freezing conditions.

Are biocides still recommended when the Fuel Conditioning System is in use?

  • Biocides, while not a recommended component to the Fuel Conditioning System, may be used at the customer’s discretion.


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