It is necessary to clean and disinfect your water holding tank(s) at least once a year or more often, if required. This is to remove algae (plant growth which produces bad tastes and odours), silt, and bacteria which may be harmful. To maintain water quality the Health & Safety Executive (HSE) recommends regular inspection of water storage tanks, calorifiers and cooling systems and to clean and disinfect them if necessary. We are ensuring the usage of German-made high-pressure water jet machines and German-made Vacuum Cleaner for a thorough cleaning. High pressure cleaners direct a high Pressure Stream or jet of water against a surface to clean.