Bathroom problems like continuous running, weak flushes

http://photohistory.oregonstate.edu/works/half/the-importance-of-regular-plumbing-maintenance

Commode issues like constant operating, weak flushes, or tank leakages typically come from used inlet shutoffs or flappers; in older Geelong homes, out-of-date fittings may also hide slow-moving leakages that tarnish floors and wall surfaces.