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WSD news
8 May 2020

John Herbert, hong kong energy saving expert, BEAM expert
John Herbert

On 6 May 2020 WSD issued advice in connection with the risk of stagnant drinking water in idle buildings. Here is the WSD link

What measures should be taken to safeguard the drinking water quality of a premises if the operation of the premises is suspended during a pandemic?

When the operation of a premises is suspended for a period of time during a pandemic, water stagnation in the internal plumbing system will occur and this could lead to the deterioration of water quality.

It is advised that before the resumption of operation, all drinking water taps in the premises should be flushed for at least 2 minutes to remove all the stagnant water from the pipework. For conservation of water, the flushed water can be used for purposes other than drinking and cooking, e.g. cleaning and watering plants.

WSD's advice is somewhat misleading, ALL stagnant water including water heaters, cooling towers, jacuzzi, hot tubs, spas, fountains, etc. may contain Legionella bacteria or other contamination.

Employers have the obligation for Health and Safety, don't create breathable aerosol during disposal of that stagnant water!


tags: drinking water, legionella, water, idle buildings, WSD notice, covid19 restarting operations

date: 27-05-20
kelcroft consultants hong kong