Toilet problems like continuous running, weak flushes

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

Toilet issues like continuous operating, weak flushes, or cistern leaks commonly come from used inlet shutoffs or flappers; in older Geelong homes, out-of-date fittings might additionally hide slow leaks that tarnish floorings and walls.