Septic holding tanks

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Rewatec holding tanks temporarily store raw wastewater for properties without municipal sewer lines or on-site treatment options.

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holding tank septic system simple to install
Simple to install

Pre-assembled and ready to use

Lightweight and easy to maneuver

Ideal for sites with limited access

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Built to last

Leak-proof design

Robust polyethylene shells

Ribbed walls for added strength

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Intuitive design

Alarm prevents overfilling

Childproof access covers

Risers can be added

What is a holding tank?

Rewatec holding tanks

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 13,200 US gal 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.

Residential holding tanks

Our 5-year warranty for residential holding tanks includes:

  • polyethylene shells
  • reservoir parts

Commercial and municipal holding tanks

Our 2-year warranty for commercial and municipal holding tanks includes:

  • polyethylene shells
  • reservoir parts

Holding tank brochures and manuals




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.

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Talk with an expert

Contact our expert in your area for more information about the Rewatec holding tank that is right for you. 

Talk with an expert