Water Tank Cleaning & Disinfection

Over time, water tanks naturally accumulate sediment, rust, and organic matter that can contaminate your water supply. Without regular cleaning, these deposits create an ideal environment for bacteria such as Legionella and E. coli, posing serious health risks and reducing water quality.

Whether in a domestic attic tank or a commercial sectional tank, proper cleaning and disinfection are essential to maintaining safe, clean water for daily use. At MyH2O, we provide professional water tank cleaning and disinfection services across Ireland — ensuring your system remains compliant, efficient, and hygienic year-round.

Domestic Attic Tank Cleaning

Attic water tanks, especially in older Irish homes, are often neglected for years. Over time, dust, insects, and debris can accumulate — particularly if the tank lid is missing or damaged. These conditions can lead to bacterial growth that compromises your water quality.

Our domestic tank cleaning service includes:

Full inspection of your attic or loft tank for contamination, corrosion, and lid integrity
Controlled draining of the tank and removal of sediment, insects, and organic matter
Deep cleaning and disinfection using approved biocides safe for potable water
Rinsing, refilling, and testing to ensure the system is clean and hygienic

We ensure your household water — used for washing, bathing, and cleaning — is safe, clear, and healthy.

Commercial Water Tank Cleaning

In commercial and industrial premises, neglected storage tanks can lead to bacterial contamination — putting staff, customers, and visitors at risk. Legionella bacteria thrive in stagnant or unclean water systems, and failure to maintain them can result in serious health risks and regulatory penalties under the Safety, Health and Welfare at Work Act, 2005.

At MyH2O, we provide specialised commercial water tank cleaning and disinfection services tailored for complex systems and high-demand environments.

Each commercial project is handled by trained, certified technicians following industry-approved methods that meet standards — including BS 8558, ACOP L8, and Health Protection Surveillance Centre (HPSC) guidelines. Our process ensures every tank is thoroughly inspected, drained, mechanically cleaned, and disinfected using safe biocides approved for potable water systems. We also perform microbiological testing where required, providing you with full documentation for compliance and audit readiness.

Frequently Asked Questions

How often should a water tank be cleaned?

It’s recommended to clean and disinfect domestic and commercial water tanks at least once a year. However, if your property has an open tank, irregular water use, or visible sediment, more frequent cleaning may be necessary.

What types of tanks do you clean?

We clean all tank types — including plastic (GRP), galvanized steel, sectional, and attic tanks — in both domestic and commercial settings. Our team uses safe, non-corrosive cleaning agents suited to each material.

How do I know if my water tank needs cleaning?

Common signs include unpleasant smells, cloudy or discoloured water, visible sediment, or debris inside the tank. If you notice insects or corrosion around the lid, it’s time for a professional inspection.

What happens during the cleaning process?

Our technicians inspect your tank, drain it completely, remove sludge and debris, disinfect internal surfaces, and refill it with clean water. The process typically takes a few hours, depending on tank size and location.

Is it safe to stay in my home or workplace during cleaning?

Yes. Our cleaning methods are safe and non-toxic. We use disinfectants that are approved for potable (drinking) water systems, and we ensure your supply is fully flushed and safe before completion.

Can you clean tanks used for well water?

Absolutely. In fact, well water tanks often require more frequent cleaning due to higher levels of sediment and organic matter. We tailor our disinfection approach based on your water source and tank material.

Do you test for Legionella bacteria?

Yes, we can carry out Legionella risk assessments and microbiological testing upon request, especially for commercial sites where compliance is required by law.

How long does tank cleaning take?

Most domestic tanks can be cleaned and disinfected within 1-2 hours. Larger commercial tanks may take longer depending on capacity, accessibility, and water system complexity.

Will the water supply be interrupted during cleaning?

Yes, your water will be temporarily turned off while the tank is being cleaned and refilled. We’ll always notify you in advance and keep downtime to a minimum.

Need More Information?

Keep your water system safe, compliant, and protected with professional tank cleaning from MyH2O.

We’ll inspect your setup, advise on the right cleaning and disinfection approach, and schedule service at a time that suits you — with minimal disruption to your home or business.