Sudden warm water failures are common as tank age; mineral accumulation from tough water in parts of Geelong lowers

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

Sudden hot water failures prevail as storage tanks age; mineral build-up from difficult water partly of Geelong decreases performance, triggers rumbling noises, and can bring about leaks or irregular water temperature levels.