Domestic water tank cleaning is essential for maintaining water hygiene and controlling the risk of Legionella bacteria. Over time, water tanks can accumulate dirt, dust, debris, mold, and harmful bacteria. If left unchecked, these contaminants can lead to serious health risks. Regular cleaning based on risk assessments ensures the tank remains clean, safe, and compliant with health standards.
The risks associated with untreated water tanks include stagnation, which can foster bacterial growth, including Legionella. Stagnation may occur due to underuse, large tanks, or system issues like blockages. Even with minimal risks, regular cleaning and disinfection are necessary to prevent contamination. Tanks can also gather rust, sediment, silt, and organic matter like leaves or small animals, further increasing the potential for harmful bacteria.
The cleaning process follows several steps, including preparation, emptying, scrubbing, refilling, chlorination, and system testing. The procedure ensures thorough disinfection by using chemicals like chlorine and sodium thiosulphate to kill bacteria. During cleaning, the system is inspected for issues like corrosion or missing components, and the water is tested to ensure proper disinfection levels.
Water tanks should be cleaned annually or more frequently for drinking water systems, as required by health guidelines. Inspections for contamination and microbiological samples should be taken every 6 months for drinking water, and every 12 months for non-potable water systems. Regular cleaning helps avoid contamination and ensures that the water remains safe for use.
In summary, domestic water tank cleaning is vital for health and safety. Regular maintenance ensures that water systems remain hygienic, safe, and free of harmful bacteria, protecting both the system and its users.