Who to call · Plumber
Toilet constantly running? Here's Who to Call
A toilet that never stops running is more than an annoyance — it can waste 200 gallons of water per day and add hundreds of dollars to your utility bill each quarter. The most common cause is a worn-out flapper valve that no longer seals tightly against the flush valve seat, allowing water to trickle continuously from the tank into the bowl. Other frequent culprits include a faulty fill valve that does not shut off at the correct water level, a waterlogged float that sits too low or too high, or a corroded overflow tube. In older toilets the flush handle linkage can also stretch or tangle, holding the flapper partially open. A licensed plumber can diagnose the exact component at fault, replace the flapper, fill valve, or entire flush assembly, and verify that the tank refills to the manufacturer-recommended line without cycling. Addressing the issue promptly prevents wasted water, avoids potential mold growth from constant condensation on the tank, and restores quiet operation to your bathroom.
What's going on
How to fix toilet constantly running
Some "toilet constantly running" cases look simple, but getting it wrong almost always costs more than calling a pro: hidden leaks, fire risk, code violations, and insurance headaches. A licensed plumber will diagnose the exact cause, use the right professional tools, and stand behind the repair. Most local pros offer free quotes and can visit the same day or the next.
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Symptoms to look for
- 01
You can hear water running in the toilet tank long after the last flush
- 02
The toilet occasionally phantom-flushes on its own without anyone using it
- 03
Jiggling the flush handle temporarily stops the running sound
- 04
Water bill has increased noticeably with no change in household usage
- 05
Condensation forms on the outside of the tank from constant cold water flow
FAQ
Frequently asked questions
Who should I call for: Toilet constantly running?
Call a licensed plumber. Plumbers have the specialized training, tools, and insurance to diagnose toilet constantly running safely and stand behind the fix. Most offer free quotes and can visit the same day or the next.
Can I fix this myself?
Some minor cases can be handled DIY, but most require a licensed plumber to avoid costly rework and safety risks. A free quote takes under a minute.
How fast can a pro come out?
Most plumbers offer same-day or next-day visits for non-emergency issues. True emergencies (burst pipes, gas smell, no heat in winter) are typically handled within 1–4 hours.
How much does it cost to fix?
Costs vary by severity and your location. Submit a free quote request to get real pricing from local pros in your area.
What are the signs of: Toilet constantly running?
You can hear water running in the toilet tank long after the last flush. The toilet occasionally phantom-flushes on its own without anyone using it. Jiggling the flush handle temporarily stops the running sound. Water bill has increased noticeably with no change in household usage. Condensation forms on the outside of the tank from constant cold water flow.