The “basic” system is a solution, with a good quality/price ratio, designed for units of modest size and is capable of ensuring a bivalent protection thanks to the use of a single anti-scale/anticorrosive & biocide product. The pump will dose into the water of the evaporative system (Tower, closed circuit cooled or evaporative condenser) the correct amount of product through the use of a metering pump connected to a pulse meter. This type of system optimizes the consumption of water and chemical product prolonging the life of the entire system. The system is supplied pre-assembled, complete with tank and metering pump (IP65) and comprises a first supply of chemical product.