The Ultimate Cold Water Tank & Legionella Remedial Work Glossary

A water heater that indirectly heats water through a coil or heat exchanger. Legionella bacteria can thrive in calorifiers if temperatures are not properly maintained.

A method used to prevent corrosion in water tanks and pipes by using sacrificial anodes or impressed current systems.

The controlled addition of chemicals such as disinfectants, corrosion inhibitors, or pH stabilisers into water systems to maintain water quality.

A water disinfection process that uses chlorine to kill microbial activity within the water storage and distribution system.

The amount of chlorine remaining in treated water after initial disinfection, ensuring continued protection against bacteria.

A water storage container used for potable and non-potable water supply. Regular cleaning prevents bacterial growth and sediment build up.

A protective coating or liner inside a water storage cistern that prevents leaks and reduces the risk of contamination from corrosion or biofilm formation.

A tank that stores cold water before distribution. Proper maintenance and temperature control are crucial to prevent stagnation and Legionella growth.

A measure of water’s ability to conduct electricity, often used to indicate levels of dissolved salts and potential contamination.

A mechanical structure that removes excess heat from water in industrial and HVAC systems. Poorly maintained cooling towers can be a major source of Legionella outbreaks.

The process of treating water in cooling towers and industrial cooling systems to prevent microbial growth, scale formation, and corrosion, ensuring efficient operation and Legionella control.

A chemical added to water systems to slow down or prevent rust and scale formation in pipes and tanks.

A point where a potable water supply meets a non-potable source, posing a contamination risk. Backflow preventers help protect against this hazard.

A chlorine-resistant protozoan parasite that can cause waterborne illness. Filtration and ultraviolet disinfection are effective methods for its removal.

A common abbreviation for a cold water storage tank, which holds potable or non-potable water for distribution.