A water tank cleaning is recommended every 2-3 years - sometimes more - sometimes less - as each rainwater system is unique.
As a rule of thumb, you will be the first to know when your tank water needs cleaning. Water discolouration, foul odour or taste
are all indications that your tank water is not healthy and requires attention. Preventative maintenance and cleaning of your rainwater system can avoid reaching this unpleasant situation.
Some reasons why tank cleaning is necessary:
- avoid the built-up sediment being drawn up and damaging your pump
- prevent sediment tainting and discolouring your water
- remove bacteria and pollutants which build up over time in the sediment
But it is important to note that experts in the industry actually recommend to NOT
clean the tank completely as the sludge in the bottom of the tank is beneficial for maintaining water quality, unless it proves to be causing health issues with your water usage. Our service advisor can clarify this with you further.
The frequency of tank cleaning & de-sludging depends on the individual tank location as many different factors affect the water quality in rainwater tanks. Generally this is every 2-3 years
as recommended by the Australian Government Environmental Health Council (see the document here