Unexpected hot water failings are common as tank age; mineral build-up from tough water in parts of Geelong lowers
https://martinucqq359.theglensecret.com/drip-discovery-101-solving-hidden-plumbing-issues-in-geelong-houses
Abrupt hot water failings prevail as storage tanks age; mineral buildup from difficult water partly of Geelong reduces effectiveness, triggers rumbling noises, and can result in leaks or irregular water temperatures.