WELS Scheme 4.5L/3L Dual Flush Efficiency Standards
Australian WELS Scheme Water Efficiency Standards
Under the Australian Government WELS Scheme (Water Efficiency Labelling & Standards) and Sydney Water Conservation Guidelines, upgrading an outdated single-flush toilet to a WELS 4-Star 4.5L full / 3L half dual-flush suite cuts household toilet water use by up to 60%, saving over 50,000 litres of water per year.