The restrictions placed on business and people by UK governments as a measure to restrict the spread of SARS-CoV-2 in mid-March 2020 has left many premises including church buildings either closed or with reduced staff. The pace of change meant that many drinking water systems may have been left stagnant over this period.

There is guidance to building owners, landlords and managers as to the steps necessary once access to buildings is permitted as to how to restore their drinking water systems.

In the first instance there are some simple steps that can be taken to

recommission your drinking water system:

 To ensure that the water in the plumbing systems is fresh, run all taps individually, starting

with the tap nearest to where the water enters the building and moving systematically to

the most distant outlet. It should be sufficient to run until the water is clear and feels cool to the touch.

 Where water is supplied from storage, storage cisterns should be emptied and

filled with water direct from the incoming supply, before the taps are flushed;

 Flushing should be carried out in a manner which minimises aerosol generation, e.g.

removing shower heads prior to flushing, to reduce the risks of Legionella transmission.

Safety considerations should be made for those flushing including appropriate PPE;

 Ensure that all appliances are also thoroughly flushed through before use, using

manufacturer’s instruction manual;

 If the property has any internal filters or water softeners, these should be checked to ensure

they are working correctly as outlined in the manufacturer’s instruction manual;

The DWI Advice Letter 02/2020 – “Maintaining drinking water quality when reinstating water supplies after temporary closure due to the CoViD-19 outbreak” can be found at