Cisterns - for sustainable rainwater utilisation in the garden and home

Cisterns offer an environmentally friendly solution for storing and utilising rainwater. These underground storage systems, also known as rainwater cisterns, are ideal for storing rainwater for garden irrigation and domestic use and help to reduce the cost of mains water. Modern rainwater cisterns can be designed so that they are barely noticeable in the garden or yard, making them a practical and aesthetically pleasing choice for environmentally conscious households and businesses.

All cisterns at a glance

Choose the right cistern capacity

Sufficient cistern capacity is crucial to bridge even longer dry periods. It is possible to combine several cisterns to cover the water requirements, but this makes maintenance more difficult. It therefore makes more sense to determine the required amount of rainwater in advance and install a suitable cistern. A correct connection to the roof drainage system with an upstream filter is important in order to collect rainwater efficiently.

Cisterns are available in various sizes and shapes, including flat tanks and classic models. Before installation, consider what the water will be used for - watering the garden, flushing the toilet, washing clothes or cleaning the house. A well-planned capacity ensures a continuous water supply and makes you less dependent on external water supply sources. For larger gardens, households and businesses, it can make sense to install particularly large cisterns. We offer cisterns from 3,000 litres, 5,000 litres, 10,000 litres up to 50,000 litres or even larger. Cisterns are also suitable for various industrial applications and can be used in a variety of ways.

Types of cisterns: rainwater storage tanks and flat tanks

There are different types of cisterns, such as classic rainwater storage tanks and flat rainwater tanks. Classic rainwater storage tanks are narrow and are buried deeper in the ground, so they require relatively little floor space, ideal for deep, well-drained soils. Shallow tanks have a larger surface area and a shallower installation depth, which makes them particularly suitable for heavy or stony soils. Shallow tanks are also well suited for installation situations with high groundwater levels. Such an underground water tank in the garden offers an inconspicuous and efficient solution for rainwater storage.

These rainwater tanks are easy to install and still offer a high storage capacity. The right cistern should be chosen in consultation with a specialist who will take into account the specific conditions of the property and individual requirements. A good specialist can also provide tips on how best to use and maintain the cistern to maximise its service life.

Possible uses of rainwater cisterns

Cisterns can be used in a variety of ways to utilise rainwater, for example for watering gardens, using service water, e.g. for flushing toilets, washing clothes or washing machines, cleaning cars, animal stables or yard areas, or for industrial purposes such as cooling rooms or machines. Using rainwater can save considerable amounts of tap water, which makes both ecological and economic sense.

Especially in dry summer months, the use of cistern water for garden irrigation can ensure a reliable water supply and protect the garden from drought. Cisterns also offer a cost-effective way of providing large quantities of water for industrial applications. On farms, cisterns can be used to supply animals and clean stables, which reduces operating costs and protects the environment.

Summary: Advantages of rainwater cisterns

Cisterns for rainwater offer many advantages: they help to save water and reduce costs. Plan water requirements and utilisation in advance and connect the cistern to the roof drainage system. Installation is relatively simple, but you should consider which type and size of cistern is best suited to your individual needs.

Careful planning and professional installation can significantly increase the efficiency and service life of the cistern. By utilising rainwater, households and businesses can make a valuable contribution to environmental protection and reduce their water costs at the same time. Investing in an underground rainwater storage tank for the garden pays off in the long term and offers a sustainable solution for your water supply.

Accessories and WISY 4-stage system

You need the right accessories to optimise the use of your cistern. WISY offers high-quality products such as the WISY vortex fine filter, which cleans rainwater efficiently, as well as calming inlets and floating outlets, which ensure even water distribution. In addition, the overflow siphon ensures that excess water can drain away in a controlled manner.

The WISY 4-stage system ensures excellent water quality through the following steps:

• WISY vortex fine filter: Removes coarse dirt and particles from the rainwater.
• Calmed inlet: Prevents sediment from being stirred up at the bottom of the cistern.
• Floating extraction: Extracts the water just below the surface, where it is cleanest.
• Overflow siphon: Diverts excess water and prevents the backflow of dirt and odours.

This system keeps your cistern clean and the water always of the best quality.

Do you have to clean a cistern?

A common doubt when using cisterns is whether cleaning is necessary. However, if the rainwater is treated in four cleaning stages - by a WISY vortex fine filter, a calmed inlet, a floating outlet and an overflow - the cistern NEVER needs to be cleaned. These cleaning stages ensure that the water always remains clean and the cistern is in optimum condition.

Costs and choice of materials for cisterns

The cost of a cistern varies depending on its size and features. Plastic cisterns are a cost-effective and durable option that are characterised by their easy handling and installation. Thanks to the different cistern sizes available, the cistern can be adapted to individual requirements, ensuring efficient water utilisation.