5 ways to actually cut your water bill

Here's where the water actually goes in a typical Gold Coast home, and the changes that make the biggest real-world difference.

Where your water actually goes

For a typical 4-person household:

• Showers: ~35% of indoor use
• Toilet flushing: ~25%
• Washing machine: ~15%
• Tap use (kitchen, bathroom): ~15%
• Dishwasher, leaks, other: ~10%

Outdoor adds 20-40% on top in summer, mostly for garden and lawn.

If you want to make a dent, the biggest levers are showers, toilets, and (in summer) the garden.

1. Replace your showerheads — single best move

An old showerhead can run 15-20 litres per minute. A modern 5-star WELS-rated head delivers ~7-8 litres per minute and most people can't actually tell the difference in feel — modern heads have engineered the pressure and spray to feel like more water.

For a 4-person household showering 7 minutes a day:

• Old head: 4 × 7 × 17 = 476 litres/day
• Efficient head: 4 × 7 × 8 = 224 litres/day
• Saving: ~250 litres per day = ~90,000 litres per year

On the Gold Coast in 2026, that's roughly $200-300/year off your water bill. The head itself costs $80-200. Pays itself back in under a year. Best ROI on the list.

Look for: WELS 4-star minimum, ideally 5-star. Quality brands (Methven Aurajet, Phoenix, Sussex) feel as good as old heads at lower flow.

2. Toilet — if it's old, dual-flush it

Pre-1993 toilets used 11+ litres per flush. Modern dual-flush is 4.5L / 3L. A household of four flushes ~25 times a day.

• Old toilet: 25 × 11 = 275 litres/day on toilet flushing
• Modern dual-flush: 25 × 4 (averaged) = 100 litres/day
• Saving: ~175 litres per day = ~64,000 litres per year

If you're on a 1990s or older toilet, replacement is a 2-hour job and the new toilet costs $300-600. Payback under 18 months for most households.

Already on dual-flush but it leaks (you can hear water running, or there's a faint stream in the bowl)? That's losing 30-200 litres a day. We fix that with a flapper or fill-valve replacement in 30 minutes.

3. Find your hidden leaks

The Gold Coast average house wastes 5-15% of water through unfixed leaks. Most go unnoticed. The easiest check:

1. Make sure no taps are running, no toilets cycling, no washing machine on.
2. Find your water meter.
3. Note the reading.
4. Don't use any water for 2 hours.
5. Check the reading again.

If the meter has moved at all, you've got a leak somewhere. Common culprits:

• Running toilet — most common. Listen for it.
• Dripping tap — a "slow drip" is 50+ litres/day.
• Hot water tank pressure relief valve — these stick open and dump water continuously. Usually visible as a drip from a small pipe outside.
• Garden tap or irrigation drip — sometimes the valve doesn't fully shut after watering.
• Underground leak in supply line — rare but expensive when it happens. Look for unexplained green patches in the lawn.

Even one slow leak fixed can save $100+/year and prevent bigger problems later (damp damage, mould, sub-slab issues).

4. Aerators on every tap

An aerator is a little screen inside the tap nozzle that mixes air with the water. Makes the flow feel just as wet at a lower volume. Often missing, broken, or full of mineral scale.

• $10 to replace.
• 5 minute job per tap.
• Saves 30-50% per tap.

Especially worth doing in the kitchen sink where you run the tap most.

5. Garden — the elephant in the bill

If your summer water bill is way higher than winter, the garden is doing it. A few changes:

• Water early or late, not midday. Midday watering loses 30-50% to evaporation.
• Switch to drip irrigation from sprinklers if you can. 60% more efficient at delivering water to the root zone.
• Mulch heavily. 75mm of mulch on garden beds halves the watering frequency.
• Rainwater tank. If you've got the space, a 3000L tank fills 10-15 times a year from Gold Coast rainfall. That's 30,000-45,000 litres of free garden water annually.
• Smart controller. Wi-Fi irrigation controllers skip watering when it's just rained. $200-300, pays itself back in a year.

6. Pressure check — sometimes too much pressure costs money

If your mains pressure is too high (700+ kPa), every tap delivers more water than it should, every shower uses more, every leak is worse. A pressure-limiting valve set to 500 kPa reduces water use everywhere in the house — without you doing anything differently.

Some Gold Coast streets run high pressure. If your taps blast water out at full open, you'd benefit. We can check the pressure in 30 seconds during any visit.

7. Hot water — the secondary saver

Saving cold water saves cold water. Saving hot water saves both water AND the energy used to heat it. So hot-water reductions hit two bills.

The biggest hot-water saver is shortening showers — every minute off a hot shower saves ~10 litres of water AND the gas/electricity that heated it. A 7-minute shower vs a 4-minute shower is a meaningful difference. Get the kids on board.

Hot water heat traps and insulated pipes also help. They prevent heat from leaking out of the unit when it's not in use, and the pipes from going cold between runs. Most newer units have heat traps built in; if yours is older, ask your plumber about adding them at next service.

Putting it together — realistic annual saving for a Gold Coast household

If you went through and did all the above:

• Showerheads replaced (4-star+ WELS): ~$250/year saved
• Old toilet replaced with dual-flush: ~$120/year
• Tap aerators: ~$50/year
• One leak fixed (typical): ~$100/year
• Mulch + early-morning garden watering: ~$80/year (summer)
• Pressure regulator (if pressure was high): ~$60/year

Total realistic saving: ~$650/year. Total upfront cost: $500-1500 depending on what you replace. Payback under 2 years.

If you want a water-efficiency walkthrough on your house — we'll check pressure, look for leaks, audit your fixtures — that's a no-charge visit during business hours. Just ring. 0472 657 042.