Toilet Tank Leak Detection and Repair in Round Rock, TX
A toilet tank leaks two ways: out onto the floor, or silently into the bowl. The first you can see. The second runs quietly day and night and can waste hundreds of dollars of water before the bill gives it away.
The two kinds of tank leak
The visible tank leak shows as water between the tank and the bowl or a puddle behind the toilet. It usually traces to the tank-to-bowl gasket, the bolts that hold the two together, or the supply connection at the fill valve. The silent leak is sneakier. A worn flapper or a failing fill valve lets water trickle from the tank into the bowl around the clock, with no sound and no puddle, just a meter that never quite stops.
A silent tank leak in an average Round Rock home can waste hundreds of dollars of water a year before anyone notices.
Finding the silent one
The silent leak hides, so we make it show. A few drops of dye in the tank, left without flushing, will color the bowl within minutes if water is sneaking through the flapper. We check the fill valve for a slow refill that signals it is passing water, and we listen for the faint hiss of a valve that never fully closes. That tells us which part is wasting the water.
If your toilet runs now and then on its own, that is the tell. Call (512) 737-6168 and we can find where the tank is losing water.
Gasket, valve, and bolt repairs
Most tank leaks are honest, inexpensive part swaps done right. A leaking tank-to-bowl gasket means pulling the tank and replacing the seal and the bolts together so it sits flat and dry. A worn flapper or a tired fill valve is replaced to stop both the silent leak and the constant refilling. A weeping supply line or shutoff gets renewed. We fix the actual failed part rather than nudging a chain or bending a float to mask it.
While the tank is open, we look at the whole flush mechanism together, since a worn flapper and a tired fill valve often age out around the same time. Replacing both at once, rather than one and then the other a month later, saves a second visit. We set the water level correctly so the tank fills quietly and stops where it should.
Why hard water wears tank parts out
Round Rock water runs hard, near 15.2 grains per gallon, and the city treats with chloramine. That mix is rough on the rubber and plastic inside a tank. Flappers stiffen and stop sealing, fill valves crust with scale and stick, and the silent leak that follows can run for months. The parts are cheap; the wasted water is not. We swap the worn pieces and check the rest while we are in the tank, so one repair does not leave another leak behind.
Cracked tanks and when to replace
Now and then the tank itself is the problem. A hairline crack in the porcelain, often below the water line, weeps slowly and cannot be reliably patched. A crack above the water line can spread under the stress of each refill. When the tank body is cracked, replacing the tank or the toilet is the honest fix, and we will say so rather than sell you a sealant that buys a few weeks. For a tank actively leaking onto the floor, call (512) 737-6168 and we can take care of it.
Not sure what you are dealing with? Talk it through.
📞 (512) 737-6168Frequently Asked Questions
How do I know if my toilet tank is leaking silently?
Put a few drops of dye in the tank and wait without flushing. If color shows in the bowl within minutes, the flapper is leaking. A meter that creeps with the toilet idle is another sign.
Why does my toilet randomly run for a few seconds?
That phantom refill means water is slipping from the tank into the bowl, usually past a worn flapper, and the fill valve is topping it back up. It is a cheap fix that stops real waste.
Can a cracked tank be repaired?
A cracked porcelain tank cannot be reliably patched, especially below the water line. Replacing the tank or toilet is the lasting fix, and we will tell you honestly if that is the case.
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