Full-retention separators

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Our full-retention separators keep hydrocarbons and other pollutants away from surface water, even during flow surcharges.

Transparent view of the Rewatec full-retention separator.

What is a full-retention separator?

Rewatec full retention separator

A full-retention separator is a specialized tank that removes oil, fuel, chemicals, and solids from the full flow of stormwater to ensure they cannot contaminate the surrounding environment.

Ideal for drainage areas of up to 30,000 m2, our full-retention separators bring trusted performance to any property with a high risk of surface water contamination.

Our solutions are designed to treat rainfall intensities of up to 65 mm per hour, which is often referred to as torrential rain.

Where are our full-retention separators used?

The Rewatec full-retention separator is most often a solution for:

  • petrol and gas stations
  • fuel storage facilities
  • large car parks and parking lots
  • vehicle workshops
  • scrap yards

How do our full-retention separators work?

Rewatec full retention separator operation

Contaminated stormwater enters the full-retention separator through the main inlet pipe.

The system allows sediment to settle on the bottom of the tank. It holds the liquid portion of stormwater long enough for hydrocarbons to separate and rise to the surface. These pollutants are safely retained until they can be extracted according to local regulations.

Decontaminated water then passes though a coalescing filter before being discharged from the tank.

All Rewatec full-retention separator models are fitted with safeguards. A high-level alarm triggers when the maximum retention capacity is reached. An automatic closure device also comes standard to keep accumulated pollutants from flowing through the system.

Full-retention separator maintenance

Protect your property and the environment by having your Rewatec full-retention separator regularly emptied by a qualified service professional.

The frequency of service depends on the application, the capacity of your tank, and the environmental regulations in your area. It is best to speak with a local expert to determine the service schedule that is right for you.

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