Concrete Cistern or Plastic Tank?
Rainwater use has become increasingly popular over the past years. An essential component of a rainwater system is the cistern. A cistern can be installed underground or in the basement. However, since there is a risk of unwanted backflow, and rain water tanks take up a lot of space they are usually not installed in the basement. Exceptions are areas that are prone to flooding, where it can be sensible to install the rainwater tank in the basement. Cisterns are available in either concrete or plastic.
Concrete Water Cistern
An advantage of a concrete cistern is that it is sturdy enough to withstand car traffic. It can be installed underneath courtyards and driveways. Concrete neutralizes the slightly acidic rainwater, thereby reducing the rainwater’s corrosive effects. Due to its weight, a big disadvantage of a concrete cistern is transportation and installation. A concrete cistern with a capacity of 6000 litres weighs approximately 5 tons.
Plastic Water Tank
Plastic tanks for rainwater storage are made of polyethylene. Compared to concrete cisterns, plastic tanks are considerably lighter, making transport and installation much easier. However, plastic tanks are significantly less sturdy and therefore cannot be driven on.
With both types of tanks it is important that the lid is adequately secured to avoid accidents, especially involving young children. The heavy weight of the lid of a concrete cistern usually does not require any additional measures. Plastic tanks must be secured with a special device.