Underground water tanks are designed for rainwater management, ie for its capture and maintenance - hence the name retention - and subsequent use for commercial purposes. With rising water prices and droughts, there is an increasing demand for rainwater systems for household and other applications. The basis of such a system is a retention plastic container and the most suitable solution is a tank located underground.
In addition, rainwater management is currently financially supported by the Dešťovka grant program, which covers up to 50% of system acquisition costs and supports three uses - capturing rainwater for garden watering, accumulating rainwater for flushing toilets and watering, and using treated wastewater as water utility.