Abrupt hot water failures are common as storage tanks age; mineral build-up from tough water partially of Geelong lowers

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

Unexpected hot water failures are common as tank age; mineral accumulation from difficult water partly of Geelong decreases effectiveness, causes rumbling sounds, and can cause leakages or uneven water temperatures.