Commode concerns like constant running, weak flushes

https://www.pitchero.com/clubs/eyelsh/news/common-plumbing-leaks-that-you-may-experience-2923600.html

Bathroom problems like consistent operating, weak flushes, or tank leaks frequently come from used inlet valves or flappers; in older Geelong homes, outdated fittings may additionally hide slow-moving leaks that stain floors and wall surfaces.