Commode problems like constant running, weak flushes

https://learn.multnomah.edu/eportfolios/918/home/why-you-need-a-plumber-to-clear-blocked-drains

Commode concerns like consistent running, weak flushes, or tank leaks frequently originate from used inlet valves or flappers; in older Geelong homes, obsolete installations might also conceal slow leaks that stain floorings and walls.