Water Efficiency Certificates

Water Efficiency Certificates


A property can be considered water efficient if specific water fixtures meet the following standards set out by the Residential Tenancies and Rooming Accommodation Regulation 2009

  • For internal cold water taps and single mixer taps (excluding bathtub taps and taps for appliances) the minimum standard is a maximum flow rate of 9 litres per minute
  • For shower heads the maximum allowable flow rate of 9 litres per minute
  • For toilets a dual flush cistern not exceeding 6.5 litres on full flush and 3.5 litres on half flush and a maximum average flush volume of 4 litres (based on the average of 1 full flush and 4 half flushes)

It should also be noted that only internal taps installed over a basin, kitchen sink or laundry tub (including single mixer taps) need to be water efficient. Other taps such as bathtub, outside taps for the garden, or taps which supply washing machines or dishwashers do not have to be water efficient.

If you’re wanting to find out if your property is currently up to the RTA standard, Better Call Plumbing can provide you with a comprehensive water efficiency inspection.