Collection: Water Tank Cleaning and Disinfection
Over time, water tanks become dirty with algae, debris, limescale, sediments, mould, rust, and corrosion which builds up a tough residue at the bottom. This leads to significant deterioration of water quality and if not maintained properly could pose serious health risks.
For businesses, this could lead to non-compliance with Safety, Health and Welfare at Work Act 2005.
Regular physical & chemical cleaning of water tanks is essential to ensure the water inside it stays clean and bacteria-free. It is recommended to get the water tanks inspected & cleaned at least once a year.
Celtic Water Solutions has amassed a wealth of experience on which we are able to draw when tackling a wide variety of challenging jobs for our clients. We offer water tank cleaning & disinfection service for both residential and commercial properties.
Need Your Tank Cleaned?
Safe water starts with a clean tank. From home attic tanks to large commercial systems, we’ve got you covered.
Commercial Tank Cleaning
Neglected water tanks are high-risk areas for the growth & proliferation of bacteria including Legionella pneumophilia, as they thrive in contaminated or stagnant conditions. When water droplets from these sources are disseminated and breathed in, this can result in the spread of potentially fatal Legionnaires disease.
Not only does it pose a risk to the health & safety of employees & customers, but it can also invite legal action against your business due to non-compliance with health & safety laws. If you are a business, it is a legal requirement to have an updated legionella risk assessment for each of your sites.
A key aspect of the control of Legionella in water systems is to maintain the cleanliness of all water systems. Regular monitoring of hot and cold water storage vessels and their systems is required to identify the presence of limescale, sediment, bio-films, corrosion, or anything that could lead to the growth of bacteria.
Our team cleans cold water storage tanks, GRP tanks, sectional tanks etc. for a wide range of businesses across multiple industries.
Domestic Tank Cleaning
It is equally important for homes to maintain the cleanliness of their attic tanks. If these tanks are not cleaned regularly, dirt and sediment can impact the pipes, plumbing fixtures and performance of installed water filtration systems.
If your attic tank is exposed without a lid, foreign bodies such as spiders, woodlice, and flies could end up being in your tank. These unwanted creatures create a perfect breeding ground for bacteria such as Legionella and E.Coli.
Therefore, domestic water tanks should be inspected regularly and cleaned when deemed necessary.
Our team offers physical cleaning & chlorination for domestic water tanks supporting homeowners to improve the water quality. We can also supply a lid to prevent unwanted creatures and debris from getting into the attic tank.
Check out the Before & After cleaning images to see the difference yourself.
Why Choose Our Water Tank Cleaning & Disinfection Service?
When it comes to safe, clean water, you need a team you can rely on. As part of Culligan, we combine decades of experience with world-class standards to deliver reliable tank cleaning in Ireland.
- Years of experience – Nearly two decades working with all types of water systems, from small attic tanks to large commercial storage.
- Global quality, local service – Backed by Culligan’s world-class practices while keeping the personal, responsive service you expect.
- Tailored to your needs – Flexible cleaning and disinfection programs for homes, businesses, and large facilities.
- Prevention first – Regular maintenance helps stop issues like Legionella before they become problems.
- Nationwide coverage – Local teams across Ireland ensure fast, reliable service.
- Safety assured – All work follows national and international health and safety guidelines.
With Culligan and CWS together, you can count on professional service, proven expertise, and peace of mind that your water is safe.
Product Enquiry
Frequently Asked Questions
How long does the tank cleaning take?
How long does the tank cleaning take?
This depends on the size and number of tanks to be cleaned. Generally, it could take anywhere between 1-2 hours for a residential attic tank and 5-8 hours for a large cold storage water tank to be cleaned and sterilized.
What is the price for tank cleaning and disinfection services?
What is the price for tank cleaning and disinfection services?
The cost of cleaning the tank will depend on the number and size of the tanks. Small water tanks can cost you anywhere between €300 - €600 while larger tanks normally cost around €600 - €2000.
How many times a year should I get my tank cleaned?
How many times a year should I get my tank cleaned?
Water tanks must be cleaned on a regular basis to prevent buildup of dirt, sediment, and harmful bacteria. We recommend that your tank be cleaned every 8-12 months.
What chemicals do you use?
What chemicals do you use?
Following water tank cleaning, we disinfect the water tanks using a silver stabilized Hydrogen Peroxide solution. We only use high-quality chemicals to carry out any disinfection work.
Why is water tank cleaning important in Ireland?
Why is water tank cleaning important in Ireland?
Over time, tanks collect sediment, rust, algae, and biofilm that can host harmful bacteria (like Legionella and E. coli). Regular cleaning helps restore water quality, prevent blockages, and protect your health and plumbing.
How often should I schedule tank cleaning in Ireland?
How often should I schedule tank cleaning in Ireland?
For potable (drinking) systems, we recommend at least once a year and periodic inspections every 6 months. For non-potable systems, annual checks may suffice unless contamination is detected.
What does your tank cleaning & disinfection process include?
What does your tank cleaning & disinfection process include?
Our standard service includes:
- Draining the tank
- Manual cleaning (scraping, vacuuming)
- Removal of scale or deposits
- Disinfection (chlorination or equivalent)
- Flushing, neutralising residuals, and system refill
- Testing residual chlorine levels at outlets
This ensures your system is safe, clean, and compliant.
Is the water safe to drink immediately after cleaning?
Is the water safe to drink immediately after cleaning?
Once we disinfect and flush the system, residual chlorine levels are neutralised and tested. After passing the relevant safety criteria, the water is safe for drinking, bathing, and cooking.
What signs show my tank needs cleaning now?
What signs show my tank needs cleaning now?
Be alert for:
- Discoloured, cloudy, or brown water
- Strange odours from taps
- Metallic or unusual taste
- Reduced water pressure
- Visible debris or sediment
- Fluctuating chlorine smell
These are common warning signs of contamination.
Can I clean my water tank myself, or do I need a professional?
Can I clean my water tank myself, or do I need a professional?
While minor maintenance (inspecting, covering, flushing) is doable, full cleaning and disinfection is best handled by professionals. We bring certified techniques, proper dosing, safety protocols, and compliance with national guidelines—ensuring a thorough, reliable result.