Toilet concerns like constant running, weak flushes

https://academy.educause.edu/eportfolios/12410/home/reasons-why-homeowners-trust-plumbers

Bathroom problems like constant running, weak flushes, or cistern leaks usually come from worn inlet shutoffs or flappers; in older Geelong homes, out-of-date installations may likewise hide slow leakages that discolor floors and walls.