The work is focused on the importance of water for the animal organism. It culminates in the importance of drinking systems sanitation in livestock. Water supplies for animals have a decisive influence on the per­formance and health of the animals. Physiological water needs for different species and categories of ani­mals affect the internal factors – animals (species, category, live weight, performance, physical activity) and its health status and external factors – stable climate and technological systems of animal husbandry (hous­ing, feeding, watering, ventilation, etc.). Regular chemical and physical cleaning and disinfection of drinking systems are prerequisite for maintaining quality and hygienic parameters of water supply for animals includ­ing operational reliability of drinkers. Cleaning is focused on the removal of contaminants and disinfection of microorganisms in the devitalisation power systems.