Understanding Bathroom Plumbing Faults
Most bathroom trouble is wear on small parts with outsized consequences. A toilet's flapper and fill valve age in the tank's chlorinated water until the seal sulks — and a running toilet can pass more water than the household uses on purpose. Cartridges in faucets and shower valves wear until they drip or refuse to balance temperature. Wax rings under toilets dry and crack, and the leak they allow is invisible until the floor around the base softens.
The second family of faults is hidden drainage: tub and shower drains that leak only when the fixture is used, traveling down to stain the ceiling below — blamed on roofs, on upstairs neighbors, on anything but the drain joint quietly opening under load. Bathrooms reward plumbers who test fixture by fixture instead of guessing by symptom.
- A toilet that runs, refills on its own, or never quite shuts off
- A toilet that rocks, or water at its base after flushing
- A tub or shower drain leaking into the room below
- Faucets that drip, handles that stiffen, water that will not balance hot and cold
- A sink drain that leaks into the cabinet below it
- Weak shower pressure in one bathroom but not the others
