High water bill? How to check for a hidden leak in your Redlands home

A water bill that jumps for no reason you can point to is one of the more frustrating things a homeowner deals with. Nothing looks different around the house, no puddles, no dripping tap you have noticed, and yet the bill says you are using far more water than usual. In most cases, the cause is a leak you simply cannot see. Here is how to check for one yourself before calling someone in.

Start with a meter test

Your water meter is the most reliable starting point, because it tells you whether water is flowing through the property when nothing should be using any.

If the reading has moved, or the leak indicator has ticked over, water is flowing somewhere on your property even though nothing should be using it. That points to a leak rather than simply higher-than-usual household use.

• Make sure no taps, appliances, irrigation or anything else using water is running anywhere in the house.
• Locate your water meter, usually near the front boundary of the property.
• Note the reading, or check the small leak indicator dial if your meter has one.
• Wait at least two hours without using any water, then check again.

Test your toilets with dye

Toilets are one of the most common sources of a hidden leak, because a worn flapper or valve can let water seep from the cistern into the bowl slowly and silently, with no visible dripping and no sound most people would notice.

This is a common cause of a bill spike that has nothing to do with a burst pipe or anything dramatic — just a worn seal letting water trickle away, litre after litre, all day and night.

• Add a few drops of food dye, or a dye tablet if you have one, to the cistern (not the bowl).
• Do not flush.
• Wait 10 to 15 minutes.
• Check the bowl. If any colour has appeared in the bowl without flushing, water is leaking from the cistern into the bowl.

Look for wet patches, even small ones

Walk the property with this specifically in mind, rather than just glancing as you go about your day.

Any of these on their own is worth investigating. None of them need to be dramatic to indicate a real leak; slow, ongoing leaks are often the ones that add up to the biggest bill increases over a full billing cycle.

• Damp or unusually green patches of lawn or garden bed, especially in an otherwise dry patch.
• Damp patches on internal walls, particularly near where pipes run behind bathrooms or the kitchen.
• A musty smell in any room with no obvious source.
• Water pooling near an outdoor tap, irrigation line, or the base of the hot water unit.
• Sound of running water when everything in the house is switched off.

Concrete slab leaks are the hardest to spot

If you have ruled out toilets and visible wet patches but the meter test still shows water moving, a leak under the concrete slab is a real possibility, particularly in homes with copper pipework running under the floor. These leaks do not show themselves easily. You might notice a warm patch on the floor if it is a hot water line, a faint sound of running water in a quiet room, or simply nothing visible at all beyond the bill itself and a meter that will not stop ticking over.

Slab leaks are not something to try to locate yourself. Finding one reliably needs proper leak detection equipment rather than guesswork, because getting it wrong means unnecessary digging in the wrong spot. This is where it is worth bringing in a professional rather than continuing to watch your bill climb while you try to pin it down.

Check your water pressure too

Pressure that runs consistently too high does not just waste water, it also puts extra strain on pipes, fittings and appliances, which can bring on leaks earlier than they would otherwise occur. If your home has never had its pressure checked, or fittings seem to wear out faster than you would expect, high pressure is worth ruling out as a contributing factor alongside any leak you find.

Rule out the simple explanations first

Before assuming a hidden leak, it is worth ruling out the ordinary explanations for a higher bill, because sometimes the answer is simply a change in how water is being used around the property rather than a fault.

If none of these account for the increase, or the jump is larger than any of them could reasonably explain, that is when a hidden leak becomes the more likely cause and it is worth working through the checks above properly.

• A new irrigation system or garden watering schedule.
• A pool that has been topped up more than usual, or has developed its own small leak.
• Visitors or extra household members staying for an extended period.
• A washing machine or dishwasher running more cycles than usual.
• The billing period covering warmer months with more outdoor water use than the previous comparison period.

What we do when you call us in

Once you have done what you reasonably can yourself, a proper leak detection visit narrows things down properly.

Our high water usage service covers this process in full, and our leaking taps and toilets page covers the smaller, more common fixture leaks specifically. For pipes that have already failed rather than just leaking slowly, see burst and leaking pipes.

• Leak detection. We use dedicated equipment to trace water movement through the property, including under slabs, without needing to dig blind.
• Confirm the source. Rather than guessing, we pinpoint the actual location before any repair work starts.
• Repair. Once located, the leaking pipe, fitting or fixture is repaired properly, whether that is a simple fitting or a more involved slab repair.
• Check the rest of the system. While we are there, we check for other early warning signs so you are not back here again in six months for a second leak.

Why acting quickly matters

A leak that is left running does not stay the same size. A worn toilet flapper that is losing a small amount of water today can wear further and lose more over the following weeks. A slab leak under a copper line can, over time, cause damage to flooring or the slab itself on top of the wasted water. Beyond the bill itself, an ongoing leak is simply water going to waste, day after day, for no benefit to anyone. Checking the meter as soon as a bill looks unusual, rather than waiting to see if the next one settles down, is the cheapest and simplest way to catch a leak while it is still small.

When to call a plumber

A leak that goes unaddressed does not fix itself, and the bill keeps climbing every day it runs. Catching it early, whether through your own checks or a proper leak detection visit, saves money and stops a slow leak from becoming a bigger repair.

• Your meter test shows movement with everything switched off.
• The dye test shows colour in the toilet bowl without flushing.
• You notice a wet patch, warm spot on the floor, or unexplained damp smell.
• Your water bill has jumped without a clear change in household usage.
• You suspect a slab leak and need it located without unnecessary digging.

Get it found and fixed

If your water bill has spiked and you cannot find an obvious cause, we can track down exactly where it is coming from and fix it properly, including under-slab leaks that are impossible to find by eye. Call Dave on 0409 364 858, serving Victoria Point, Alexandra Hills and right across the Redlands and Brisbane bayside. Lifetime workmanship guarantee: it works when we leave, or we come back and fix it.