Having a clean water tank is a vital element of health & safety regulations. The team here at London Water Treatment are available to ensure your water tank is health and safety compliant. Whether you are responsible for a small domestic tank or bigger commercial system, our team of experts can deliver the required service in professional, reliable and competitively priced manner.

You can find cold water storage tanks in residential homes, communal water tanks in blocks of flats, schools, hospitals, offices, restaurants, hotels and other commercial properties. They are a vital part of the property’s water system. Whatever building you are in, it is more than likely to have a cold water storage tank.


Tanks can be located on the roof of a building, inside lofts, in storage cupboards, in basements and plantrooms. We can arrange the necessary safety equipment to access your tank regardless of its location.

As a vital part of your water system, it is imperative to keep your water tank clean to ensure that it’s not only safe, but operating optimally.

Over time, water tanks can be exposed to dust, dirt, mould, vermin and sediment build up. This can encourage bacteria to develop in the water which can be harmful if left untreated.

One of the main concerns with bacteria build up in water is that it could lead to legionnaires disease which is very harmful to human health. The best way to avoid this is to arrange regular inspections of your water tank to prevent harmful bacteria levels being reached. It is best to act preventatively and have your tank cleaned regularly rather than having to react to a breakout of bacteria growth.

Whatever size tank or system you have, all cleaning services will start by draining the current system and removal of any sediment build up that may have accumulated in the tank. Once the tank is clear of sediment build up, we carry out a thorough cleaning operation using approved chemicals and cleaning agents to deliver a safe and effective result.

As the water system must be drained for work to commence, we work with our clients to identify a suitable time to carry out the service to impose as little disruption as possible.

The tank can be cleaned at any time that suits you and/or the residents/staff at the premises we will be working in. We recommend having it cleaned if you notice it has debris/scale or if it has no lid and/or as part of a regular maintenance plan.

If you have a Legionella Risk Assessment carried out and they recommend that you have your tank cleaned, this should be booked as early as possible.

When checking your water’s pH number, if you discover it has veered away from the health and safety standards, you should book a water tank cleaning service as soon as you can.

Finally, if you take ownership of a property where the water system has not been used for a pro-longed period of time, it is advised to have the tank cleaned as it is likely bacteria would have developed in stagnant, still water build up in the system.

At London Water Treatment, we offer a professional and friendly water tank cleaning service to both domestic and commercial clients. Our experience in the industry means you can rest assured that we will deliver a thorough cleaning service that will ensure your water tank and water system will meet all necessary health and safety requirements.

If you have any questions on our water tank cleaning service, feel free to get in touch and we’d be happy to answer any questions you may have. Alternatively, if you wish to request a quote for this service, get in touch to do so.

Our expert team here at London Water Treatment are able to provide commercial water tank cleaning services to suit a whole host of businesses, of all shapes and sizes. Whether you manage a factory, leisure centre or other commercial property and are looking to have your water tank cleaned, we are here to help.

We are always up to speed on the latest regulations regarding water safety and our team are trained to know exactly how to manage hygiene levels within any water system to ensure all our work complies with the latest Health and Safety Guidelines

Our process involves removing any layers of biofilm which is where any legionella bacteria is likely to develop, before carrying out a thorough disinfection clean.

Once we have completed any job, we will provide our customers with a Chlorination certificate so that you can showcase being up to date with your water hygiene. We inform all clients that once their water tank has been cleaned, they should continue to have their tanks inspected annually to ensure they are compliant with all relevant health & safety standards.

Unsurprisingly, the length of time the job takes depends on the size and overall system set up. It also heavily depends on the level cleanliness it is in when we arrive.

However, we can offer some guidance on timings to help our customers get an idea for how long the work will take to carry out.

This is highly dependent on the outcome of your annual water tank inspection, once we have this detail, we can advise how best to maintain it going forward.

On average, water tanks require cleaning every two or three years, but this is reliant on the level of sediment build up over the period of time, which is also linked to how hard your water supply is.

We strongly suggest you have any potable water supply cleaned annually to maintain the required hygiene levels and prevent causing any health issues.