The WELS Standard is cross-referenced to the performance requirements of other product standards and technical specifications.
The WELS Standard, the other product standards and technical specifications can be purchased from Standards Australia .
All registered products can be searched for on the WELS product search database.
- a standard showerhead uses about 15 to 25 litres of water per minute - a three star rated water efficient showerhead uses as little as 6 or 7 litres per minute.
- a standard showerhead uses at least 120 litres of water per eight-minute shower whereas a water efficient model uses less than 72 litres or 40 per cent less water
- installing a water-efficient showerhead saves about 14,500 litres per household each year and
- gas hot water costs for a standard showerhead are around $1,500 over ten years whereas gas hot water costs for a water-efficient shower head are only $790 over ten years or a 47 per cent reduction.
- typical taps discharge 15 to 18 litres per minute compared with low-flow and aerating models which use as little as 2 litres per minute depending on the intended application and
- taps with an aerator or flow restrictor may reduce flow to less than a third of standard taps.
- AS 1172.1-2005, Water closets (WC), Part 1: Pans
- AS 1172.2-1999, Water closet (WC) pans of 6/3 L capacity or proven equivalent, Part 2: Cistern
- ATS 5200.021-2004, Technical Specification for plumbing and drainage products, Part 021: Flushing valves for water closets and urinals-For use with break tank supply
- ATS 5200.020-2004, Technical Specification for plumbing and drainage products, Part 020: Flushing valves for water closets and urinals-For use with mains supply and
- ATS 5200.030-2004, Technical Specification for plumbing and drainage products, Part 030: Solenoid valves.
About 22 per cent of water savings under the WELS Scheme comes from toilets (lavatory equipment) because:
- an old-style single flush toilet can use up to 12 litres of water in one flush, whereas more water efficient dual flush toilets average less than four litres
- a single flush toilet costs around $760 over ten years to operate compared with a water-efficient dual flush cistern which costs around $250 over ten years to operate or a 67 per cent reduction
- replacing a traditional single flush toilet with a water efficient dual flush toilet saves about 51 litres per person per day and
- using a water efficient dual flush toilet reduces household water use by around 30,000 to 40,000 litres per household per year.
- AS/NZS 3982:1996, Urinals and
- ATS 5200.004-2005, Technical Specification for plumbing and drainage products - Urinal flushing cisterns.
WELS urinals save water because:
- the average urinal uses about 2.2 litres per flush compared with the most efficient urinals which use 1.5 litres per flush, a reduction of more than 30 per cent
- an increasing number of urinals have 'smart controls' to reduce unnecessary flushing and
- the most efficient urinals combined with smart controls reduce water use by 40-50 per cent.