70 West Plumbing · Homeowner guide
Why Does My Toilet Keep Running? What to Notice Before You Call
The sound and timing can help you describe the problem and decide when to call.
A running toilet usually means a part inside the tank, often the flapper or the fill valve, isn’t sealing or shutting off. If it keeps running or refills when nobody has flushed, water is slipping through. The timing gives you a useful clue: does it run continuously, only after a flush, or in short bursts later? You can describe that pattern without taking the tank apart.
The pattern
Continuous running or a surprise refill?
Water that never stops after a flush suggests the tank is not settling into its normal filled state. A toilet that goes quiet and refills again later may be losing water slowly between the tank and bowl. If the handle sticks or the sound changes when you move it, include that detail.
Check the floor separately. Water around the base or a supply connection is a visible leak, not the same as water passing quietly into the bowl. If water is spreading or the toilet feels loose, stop using it and call about that condition promptly.
Safe observations
What the tank parts do
In many toilets, a flapper or another seal opens to let tank water flush into the bowl, then closes so the tank can refill. If it does not seal, water can keep slipping into the bowl and trigger another refill. The fill mechanism admits water to the tank and should stop when the proper level is reached. A sticking handle, chain or fill part can also affect the cycle. Tank designs differ, so the part that needs attention depends on the fixture.
If the lid lifts easily, you can watch one flush and note whether water continues entering the tank or whether the handle returns normally. Keep the lid secure afterward. There is no need to adjust or remove components just to describe what you see.
A simple check
Check for a leak you cannot hear
A toilet can lose tank water without an obvious running sound. EPA WaterSense suggests putting a few drops of food coloring in the tank, waiting about 10 minutes without flushing, and looking for color in the bowl. Flush afterward to avoid staining. Color in the bowl indicates water passed from the tank while the toilet was idle; it does not identify which part needs repair.
If lifting the lid is awkward or water is already on the floor, skip the check and describe what you have observed.
Repair decision
Repair or replacement depends on the fixture
A running toilet often prompts a tank-part inspection, but the fixture’s condition matters too. Mention cracks, movement, water outside the toilet or repeated trouble. Ask what the plumber found, whether a compatible repair part is available, and what would change with replacement. If you are considering a new toilet for comfort or efficiency, say so; a running sound alone is not a reason to assume the whole fixture must go.
For a replacement, EPA WaterSense labeling can help compare toilets for water efficiency and performance. The appropriate model and installation still depend on your bathroom and the existing connection.
Call checklist
What to tell the plumber
Give one compact description: when the running starts, whether it stops, what the handle does, and whether water appears outside the toilet. Add the dye-check result if you tried it, plus the brand or model if it is easy to read. Say if the toilet is still usable or water is spreading.
70 West Plumbing handles toilet repair and installation in Hot Springs, Glenwood, Bismarck and Bonnerdale. Those details help us understand the problem.
Need a plumber?
Toilet still running? Give us a call.
Tell us when the toilet runs and whether water is reaching the floor. We serve Hot Springs, Glenwood, Bismarck and Bonnerdale, 6AM–6PM daily. Call 501-547-0518 or request a quote to discuss repair or installation.