A Cistern or Tank used for potable water storage within England and Wales requires compliance with the requirements of Schedule 2, Section 16 of the Water Supply (Water Fittings) Regulations 1999. Similar Regulations also apply in Scotland and Northern Ireland.
A Water Tank installed in commercial, industrial and institutional buildings for potable water provision requires the owner, within his duty of care obligations to users of these establishments, to conduct an annual inspection of the tank to provide assurance the water stored is at the required wholesome quality. Water samples require to be taken and the condition of the tank structure noted.
Should any significant level of debris be observed internally and / or water quality is less than the wholesome level required it is recommended the vessel be drained, internal surfaces washed down, the tank re-sterilised and the water quality rechecked before returning it to service.
During inspection the following are some of the critical observations required.
Modern-day cisterns and tanks are unlikely to suffer from the structural defects listed 1) to 5) but tanks of some vintage could well require considered attention. Irrespective, a check should always be made regarding the main Regulatory requirements listed 6) to 12) to provide the necessary assurance on tank design and water quality.