Commode issues like continuous operating, weak flushes

https://classes.iwcc.edu/eportfolios/296/home/common-plumbing-leaks-that-occur-in-homes

Bathroom problems like constant running, weak flushes, or tank leaks commonly stem from worn inlet valves or flappers; in older Geelong homes, out-of-date fittings may also conceal slow leakages that tarnish floors and walls.