How Do You Know If You Have a Leak

Water leaks can be costly and happen when you least expect it—whether you’re in an older home or a brand-new build. Learn the telltale signs of a water leak and how to spot trouble before it hits your wallet.

Water leaks can sneak up on you and cost a fortune if left unchecked. Whether you’re living in a weathered old Queenslander or a modern brick home, leaks are always a possibility—and they’re not always easy to spot. Some show up as little signs, others hit you with a sky-high water bill.

So how do you know if you’ve got a leak? Here are some common signs to keep an eye out for.

Spot the Signs of a Water Leak

Tap Repair

1. Dripping Taps and Leaky Fixtures

That constant drip… drip… drip isn’t just annoying—it’s wasting water and money. A leaky tap is usually caused by a worn washer or faulty cartridge. A quick fix by a plumber (or a handy homeowner) can sort it out before it gets worse.
Woman Checking Washing Machine

2. Puddles Around Appliances

Keep an eye on your washing machine, dishwasher, fridge, or even your laundry tub. If you notice unexplained puddles forming underneath, chances are there’s a leak somewhere. Don’t ignore it—water damage can creep in quickly and cause serious harm to your flooring and cabinetry.
Dry Water Seals

3. Swollen Cabinets and Vanity Units

Check under the kitchen sink and in your bathroom vanities. Warped timber, swelling, musty smells, or discolouration are red flags. These signs usually mean there’s a slow leak that’s been going on for a while—and it’s time to call in the pros.
blocked toilet

4. Toilet Cistern Test

Think your toilet might be leaking? Try this trick: add a few drops of food colouring to the cistern and wait 10–15 minutes. If the colour seeps into the bowl without flushing, you’ve got a leak. Another easy test is to place some dry toilet paper at the back of the bowl. If it gets damp without anyone using the toilet, that’s a sure sign.
Cutting Grass with a Mower

5. Random Damp Patches Outside

If parts of your lawn or garden are constantly soggy—even when it hasn’t rained—it could mean you’ve got an underground leak or burst pipe. This kind of leak can waste a huge amount of water and may even erode the soil around your foundations. Don’t ignore it.
Leaking Hot Water Tank

6. Leaks in the Hot Water System

Take a look at your hot water unit. If you spot any water trickling down the side or pooling underneath, it’s time for a closer look. Hot water system leaks can quickly lead to a total breakdown if they’re not caught early.
Outdour Tap

7. Do the Water Meter Test

Want a solid way to test for hidden leaks? Try this:
  • Turn off all taps and water-using appliances in the house.
  • Head to your water meter and write down the reading.
  • Wait 30 to 60 minutes without using any water.
  • Check the meter again.
If the numbers have changed, you’ve likely got a leak somewhere on the property.

Final Word

Water leaks might start off small, but they can lead to massive repair bills and water waste if you let them go unchecked. The sooner you spot the signs, the easier (and cheaper) it is to fix.

If you’ve noticed any of the warning signs above, don’t wait until it turns into a bigger problem. Give The Plumbing and Electrical Doctor a buzz on 13 10 91. We service Newcastle, Canberra, Lake Macquarie, Central Coast, Hunter Valley, and Port Stephens. Our experienced team is ready to help you stop that leak and get your plumbing sorted—fast, friendly, and done right.

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