Sudden hot water failures are common as storage tanks age; mineral build-up from difficult water partly of Geelong lowers

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

Sudden hot water failures are common as tank age; mineral build-up from tough water partially of Geelong reduces effectiveness, creates rolling noises, and can cause leaks or irregular water temperatures.