Beware the
dormant building Plumbing systems rely on regular use to work effectively and in some cases safely. There are many examples: • One singular flush of your toilet may not effectively remove all the waste from your sanitarydrainage system. • Grease that might be part of a kitchen sink wash-up can stick to the insides of waste pipes that have had limited or no use for an extended period. • Water supply systems, in particular hot water supply systems, rely on a regular flow through the pipes to reduce the possibility of the water cooling to a temperature that might encourage the growth of Legionella bacteria. 12 | Australian Plumbing Industry Magazine | Summer 2021
Here’s how to recommission plumbing systems in a building that has been vacant for a prolonged period: Ventilation Owner, occupiers and building managers should seek independent advice regarding ventilation requirements and minimum recommended regular air changes specific to their building design and use. This advice should be sought from a qualified Mechanical Services Engineer. Water supply Flush all cold-water pipework first and then the hot water pipework. Individually flush, with clean water, all appliances connected to the water service – coffee machines, ice machines, washing machines, dishwashers, etc. If possible,
As your clients return to residential and commercial buildings after a long COVID-19 hiatus or just a long winter, ensure they understand the risks. Master Plumbers Chief Technical Advisor Gary Bath explains.
remove aerators, shower hoses and point-of-use water filters. Flush each cold-water outlet for one minute (start with any outside taps and/or water points that are closest to where the water supply enters the building). In the case of multiple, closely located taps, like in toilet blocks, flush the first tap for one minute and all others for 30 seconds. If your building’s water supply is stored in a tank, (excluding a domestic rainwater tank) consult your plumber as it may require chemical dosing of that supply. Any testable backflow device should be tested annually by a licensed plumber. Precautions should be considered to avoid generating aerosols when flushing water services and appropriate personal protective
