Toilet constantly running — Krakow, Lesser Poland

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.