Holding tanks

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Rewatec holding tanks temporarily store raw wastewater for properties without municipal sewer lines or on-site treatment options. Trust these durable solutions to safely isolate sewage, ensuring your soil and the environment are always protected from contamination.

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holding tank septic system simple to install
Simple to install

Pre-assembled and ready to use.
Lightweight and easy to manoeuvre.
Ideal for sites with limited access.

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Built to last

Leak-proof design.
Robust and durable polyethylene shells.
Ribbed sidewalls for added strength.

holding tank septic system intuitive design
Intuitive design

High-level alarm prevents overfilling.
Childproof access covers.
Risers can be added.

What is a holding tank?


A holding tank receives and temporarily stores sewage until it can be removed by a septic pumper. It is a solution for any property where municipal or on-site wastewater treatment is impossible or impractical.

With up to 50,000 L of nominal capacity, Rewatec holding tanks are ideal for virtually any size of project. All models are built to last, featuring a ribbed design that prevents breakage and a tough polyethylene shell that stands up to years of use.

Rewatec holding tanks are delivered as one-piece units with no leaky seams that could contaminate your property or the surrounding environment.


  • remote properties
  • second homes
  • seasonal cottages
  • temporary building or renovation projects
  • sites too small for on-site treatment systems

How do our holding tanks work?

Wastewater from bathrooms, kitchen drains, dishwashers, and washing machines runs into a main drainage pipe that flows into the holding tank.

The holding tank has no outlet or partition walls. Its only job is to safely store raw wastewater until it can be removed by a septic pumper and transported to a treatment plant.

Inside the holding tank, a high-level float is connected to an alarm that activates when the reservoir is almost full. This warning system prevents over-filling that, if left unchecked, could result in a sewage backup.

Holding tank maintenance

Protect your investment in your property by having your Rewatec holding tank regularly pumped by a qualified septic service professional.

The frequency of service depends on the size of your tank, the amount of wastewater you generate, and the environmental regulations in your area. It is best to speak with a local septic professional to determine the service schedule that is right for you.

Where do we offer holding tanks?

We proudly offer Rewatec holding tanks in the following countries:

Available models

From residential to large-scale, our lineup of high-quality holding tanks gives you the range of choice you need to protect your property and the environment for years to come.

Get in touch

We are here to help. For more information about our products and services, including their availability around the world and in your home country, please contact our team of experts today. 

Contact us