PEHD tank selection calculators were created in cooperation with Uponor Infra, which is a leading international supplier of plastic pipe systems for underground infrastructure. Extreme weather phenomena, such as torrential rains or prolonged rainfall, which have been increasing in recent years, have confirmed that sewage systems are not adapted to accept excess water. The solution to the problem may be the use of rainwater retention tanks. The PEHD storage tanks selection calculator allows you to calculate the required retention volume, and then select Weholite tanks of the appropriate diameter and length. Depending on the available space and building conditions, the tool will facilitate the selection of the optimal solution for the project requirements.