Overview
Cold water storage tanks collect sediment, scale, debris and sometimes insects or vermin. That material feeds biofilm and gives legionella somewhere to grow. If an inspection finds contamination, the tank should be cleaned and disinfected. We carry out the work with minimal disruption and issue a certificate when it is done.
What is included
- Pre-clean inspection and photographs
- Isolation and drain down
- Removal of sediment, scale and debris
- Chlorination and contact time verification
- Flushing, refilling and post-clean sampling where required
- Certificate of disinfection
- Recommendations or upgrades for lids, screens, insulation and overflows
Who needs it
Any building with cold water storage tanks: blocks of flats, offices, schools, hotels, hospitals, care homes and industrial sites.
How often
Tanks should be inspected at least annually. Cleaning and disinfection is carried out when inspection shows it is needed, rather than on a fixed timetable.
Legislation and standards
HSG274 Part 2, BS 8558 and BS EN 806, Water Supply (Water Fittings) Regulations 1999.
Frequently asked questions
How often should water tanks be cleaned?
Tanks should be inspected at least annually and cleaned and disinfected when the inspection shows sediment, debris or contamination, rather than on a fixed timetable.
Will the water be off during tank cleaning?
Usually only for a few hours. Where water must stay on, we can arrange temporary bypasses or work out of hours.
Do you replace tanks?
Yes. Where a tank is beyond economic repair or does not meet the Water Fittings Regulations, we can quote for a replacement WRAS-approved tank.
Water Tank Cleaning & Disinfection across the UK
We provide water tank cleaning & disinfection in every part of England, Scotland, Wales and Northern Ireland. Choose a city for local information: