Why Your Toilet Keeps Running (And What It Is Costing You)
The sound is the smallest part of the problem
A running toilet is the most expensive quiet problem in a house. A flapper that does not seal can pass through the region of two hundred gallons a day without anybody noticing, and the first evidence most Arkansas homeowners get is a water bill that has doubled for no apparent reason.
The reason it goes unnoticed is that it is intermittent. The toilet runs, stops, and runs again twenty minutes later when the tank has quietly drained down past the fill line. In a spare bathroom or a rental, that can go on for months.
The ten-minute test that tells you which part failed
There are only three common causes, and you can identify which one you have without tools.
First, take the lid off the tank and look at the water level. If water is spilling into the overflow tube — the open vertical pipe in the middle — the fill valve is not shutting off at the right level, or it is not shutting off at all. That is a fill valve or float adjustment.
Second, if the water level is below the overflow tube and it is still running, the leak is going out the bottom. Put a few drops of food coloring in the tank, wait fifteen minutes without flushing, and look in the bowl. Color in the bowl means the flapper is not sealing.
Third, if the handle has to be held down or jiggled, the chain length or the flush lever is the issue, and that is the easiest of the three to correct.
What you can reasonably do yourself
Flappers and fill valves are inexpensive and sold in every hardware store in the state. If you are comfortable shutting off the supply valve behind the toilet, draining the tank and swapping a part, this is a genuinely doable afternoon job.
Where it goes wrong is the shutoff valve. In older Arkansas homes those valves have not been turned in fifteen or twenty years, and asking one to close for the first time is often how a running toilet turns into a flooding bathroom. If the valve will not turn by hand, stop and call rather than forcing it.
When it is not the toilet at all
Occasionally the running is a symptom of something else. A toilet that refills on its own with nobody using it — called phantom flushing — is a slow flapper leak. A toilet that runs and also gurgles, or where the bowl level rises and falls, can point at a venting or main line issue rather than anything inside the tank.
If you have replaced the flapper and the fill valve and it still runs, the tank-to-bowl gasket or the flush valve seat is usually the culprit, and at that point the economics of repairing a very old toilet start to favor replacement.