WELS Ratings Explained: How to Save Water and Money in Your Melbourne Home
The WELS sticker on a tap, shower or toilet looks like a tiny detail but it’s the most useful information on the box. WELS (Water Efficiency Labelling and Standards) is the Australian Government scheme that rates how much water a fixture uses, on a six-star scale. The higher the stars, the lower the water use and the lower your water bill. This Melbourne-focused guide explains what the ratings mean, where they really matter, and which fixtures to prioritise.
What is WELS?
WELS is a mandatory Australian Government scheme administered through the Water Efficiency Labelling and Standards Act. Every regulated fixture sold in Australia must display a WELS rating sticker showing stars (1 to 6) and a flow figure (litres per minute for taps and showers, litres per flush for toilets, litres per cycle for washing machines).
The register is public and free to search at waterrating.gov.au. If a product doesn’t have a sticker, it isn’t legally sold in Australia.
What the stars actually mean
1 star: the legal minimum, generally the highest water use. Still legal to sell but not water-efficient.
2 to 3 stars: average. Older fixtures often sit here.
4 stars: good. Modern mainstream fixtures.
5 to 6 stars: excellent. Premium efficiency fixtures with flow restrictors or aerators.
For showers, the scale runs from about 16 litres per minute (1 star) down to under 6 litres per minute (6 stars). For toilets, 1 star is around 6.5 litres per flush, 6 stars is under 4 litres per flush (dual-flush average).
Which fixtures matter most for your bill?
Not all WELS-rated fixtures move the needle equally. In a typical Melbourne household:
Showers: highest impact. A family of four using showers daily can save 50,000 to 70,000 litres a year going from 2-star to 5-star showerheads. At 2026 Yarra Valley Water rates, that’s $200 to $350 per year.
Toilets: high impact. Dual-flush 4-star or better toilets save 30,000 to 50,000 litres a year for a family of four.
Taps: medium impact. Kitchen tap is more used than bathroom basin. A 5-star kitchen mixer with aerator saves perhaps 10,000 to 15,000 litres a year.
Washing machines: medium-high impact. Modern front-loaders are typically 4-5 stars and use 60-100 litres per cycle.
Dishwashers: medium impact. Modern 4-5 star dishwashers use 10-15 litres per cycle, far less than washing dishes by hand.
The cost of buying higher star ratings
Most mid-range tapware in Australia is now 4 to 5 stars by default. Going from 4 stars to 6 stars usually costs only $20 to $60 more per fixture. The payback is fast, often within 2 to 4 years on a typical household, less if you live in a hard-water area where you’d normally over-use mixers to flush sediment.
Melbourne water authority rebates
Yarra Valley Water, South East Water and Greater Western Water periodically offer rebates on high-efficiency fixtures, particularly during drought conditions. Check the current scheme at yvw.com.au, southeastwater.com.au or gww.com.au.
The compliance angle
All plumbing installations in Victoria must use WELS-rated fixtures. A licenced plumber’s Certificate of Compliance confirms the installation used compliant fixtures. See vba.vic.gov.au for the regulatory framework.
FAQ
Do I have to choose 6-star fixtures?
No. WELS labelling is mandatory but you can buy any star rating that’s on the market. Most builders and renovators choose 4 to 5 stars as a balance of cost and efficiency.
Can I retrofit an aerator to an old tap?
Yes. Aerators screw into most modern tap spouts and reduce flow by up to 50 percent. They cost $5 to $20 and pay for themselves in a few months.
Does a 6-star shower feel weak?
Modern 6-star showers use air-injection technology so the perceived pressure stays strong while the actual water use drops. Brand and head design matter more than the star rating for shower feel.
Why doesn’t my water bill match my star ratings?
Water bills are dominated by showers, washing machine cycles, garden use and leaks. A leak of 1 litre per minute wastes 525,000 litres a year. Star ratings only affect deliberate water use.
Where can I check WELS ratings?
The official register is waterrating.gov.au. Every regulated fixture sold in Australia is listed.
Work with a plumber who knows efficient fixtures
Newton Plumbing installs high-efficiency fixtures across Melbourne and explains the WELS trade-offs before you buy. We’ll help you spend money where it actually moves your bill.
Phone Newton Plumbing - +61 414 951 362. Licence #107733. Newton Huang Licenced Plumber.
Related reading:
Tapware in Wet Areas: Chrome, Brushed Nickel or Matte Black
Toilet Buying Guide: Caroma, Roca, Fienza
Bathroom Renovation Plumbing Costs in Melbourne
Hard Water in Melbourne’s East
External references:
waterrating.gov.au - WELS register
yvw.com.au - Yarra Valley Water efficiency rebates
vba.vic.gov.au - Plumbing Regulations 2018
sustainability.vic.gov.au - water efficiency guidance