The Running Toilet: What's Actually Wearing Out
A toilet that runs on and off, or never fully stops, usually comes down to one of three parts: the flapper, the fill valve, or the flush valve seat. The flapper is a rubber seal that degrades over a few years, especially with the harder water common across the Valley, which leaves mineral deposits that keep it from seating properly. The fill valve controls how the tank refills and can start cycling on its own once its internal seal wears; the flush valve seat is the surface the flapper rests against, and mineral buildup there causes the same slow leak even with a brand-new flapper.
We rebuild whichever part is actually causing the leak rather than replacing the whole tank mechanism by default, which keeps the repair fast and keeps the cost at the lower end of the posted range in most cases.
