Commode issues like consistent running, 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running, weak flushes, or tank leakages commonly stem from used inlet shutoffs or flappers; in older Geelong homes, out-of-date fittings may likewise hide slow leakages that discolor floorings and wall surfaces.