Why Your Toilet Keeps Running
One of three cistern faults is to blame when your toilet keeps running: a refill valve that fails to close, a seal leaking water into the pan, or a fill level set past the overflow. Each fault leaves its own sign, and the food colouring check further down sorts between them in minutes. Cisterns around Upper Kedron range from 1980s-2000s fittings through to brand-new Ellendale hardware, so worn parts and early faults both turn up.
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Upper Kedron Plumbing Services sends a licensed plumber to sort these faults, out near the Ferny Grove shops and station and through the newest courts against the bush. This guide covers how to fix a running toilet: the causes, the dye test and the parts an owner may legally touch.
Why the Cistern Never Stops Filling
A cistern that keeps filling has one of three faults: a refill valve stuck open, a leaking outlet seal, or a fill level riding above the overflow pipe.
Each fault announces itself differently:
A hiss that continues after the tank has refilled
points to a refill valve that is not closing off.
A cistern topping up by itself between flushes
, or water sliding down the pan's rear wall, points to a leaking outlet seal.
A drip outside at the overflow
means the fill level sits too high, so the refill valve or its float needs adjusting.
The overflow is a safety path: it lets surplus water leave the cistern instead of spilling across the floor. That is why a valve stuck open often shows up as a drip outside before anything looks wrong inside.
The outlet valve is the part that empties the cistern when you press the button, and its rubber seal holds the water in between flushes. When that seal perishes, water slips past it into the pan, and the refill valve keeps topping the cistern up to replace what is lost. The result sounds like a toilet that never finishes.
Water Runs but the Cistern Stays Low
A cistern that will not fill usually comes down to a worn or blocked refill valve, a float set below its mark, or a stop tap not fully open.
Work through those three in order. A tap half closed at the wall slows every refill. A float set low shuts the valve off early and leaves the tank short.
One more pattern deserves a name. Water can run hard while the level never rises, because the outlet seal is letting water escape at the same rate it enters. The cistern cannot hold anything against that.
The QBCC List of Unregulated Cistern Work
The QBCC lists three cistern parts as unregulated work: the drop valve washer, then the float valve washer, then the suction cup rubber. Someone with the right knowledge and skill can repair or replace those parts without a licence, an approval or a report. The result still needs to satisfy the standards set by legislation and codes.
Everything else inside a cistern counts as minor work under Queensland rules: a QBCC licensee does the job, and it needs no permit or Form 4.
Rentals add a duty. The owner or manager of a Queensland rental must keep the premises in good repair. The tenant reports a fault as soon as it shows up.
Check for a Silent Leak With Food Colouring
Add food colouring to the cistern water, skip the flush, and wait.
Colour showing in the bowl
tells you cistern water is seeping past the outlet seal.
No colour after the wait
means the outlet seal is doing its job, so the refill valve and the fill level come next.
Flush when finished
Food colouring does not stain ceramic bowls.
No colouring at home? Rest a dry sheet of toilet tissue high on the bowl's back wall, above the water line. If it wets through, a slow trickle is running down the porcelain behind the seat, which suggests a leaking cistern.
Happy to leave it to a pro? Upper Kedron Plumbing Services runs this check as the first step of every toilet visit.
Does the Water Utility Cover a Running Toilet
No, a running cistern gets no help from the utility's concealed leak adjustment, which excludes leaking toilet cisterns. Taps, hot water systems and other water appliances are excluded the same way.
On a property, the owner answers for leaks and for the water they waste. A running cistern can quietly inflate the water bill for weeks, because every top-up passes the meter on its way to the sewer.
When to Call a Plumber
Call a licensed plumber when colour appears in the bowl, when the overflow drips outside, or when the fault sits beyond the three unregulated parts. Anything inside the cistern past those washers is minor work for a licensee, not a home handyperson job.
Our toilet repairs page covers the full repair list for cisterns, pans and buttons.
Queensland's emergency list for rentals names a toilet that is blocked or broken, not one that runs. A running cistern therefore counts as routine rather than an emergency.
Running Toilet Questions From Upper Kedron Homes
Call (07) 3524 0766Will food colouring stain my toilet bowl?
No, food colouring does not stain ceramic bowls. Flushing afterwards washes the colour away.
Will the water utility cover a running toilet in Upper Kedron?
No, Urban Utilities excludes leaking toilet cisterns from its concealed leak adjustment. The owner answers for the leak and the cost of the wasted water.
What does it cost to fix a running toilet?
The price hinges on two things: which part has failed, and how easily the plumber can reach the cistern and its stop tap. The fixed quote settles the figure before work starts.
Who fixes a running toilet in an Upper Kedron rental?
The owner or manager must keep the rental in good repair, and the tenant reports the fault as soon as they notice it. A running cistern counts as routine and is fixed within a reasonable time; a blocked or broken toilet is on the emergency list.
Call Us About a Running CisternWe'll call you back.
Phone (07) 3524 0766 for a licensed plumber in Upper Kedron. We work under QBCC No: 15024607, with flat-rate pricing, no hidden fees and same-day where we can.
To claim your $0 call-out fee, call (07) 3524 0766 today.