How Long Should a Hot Water System Last in Brisbane?
Manufacturers quote 10 years, but Brisbane water chemistry and coastal air push that number in both directions. Here's what we actually see across thousands of jobs in Logan, Brisbane and Ipswich.
Electric Storage
Vitreous-enamel tanks: 8–12 years. Stainless steel: 12–15 years. The anode rod is the single biggest lifespan lever — replace every 5 years and you'll add 3–5 to the tank.
Gas Continuous Flow
12–15 years for Rinnai, Rheem, Bosch. Heat exchangers eventually pinhole, especially in coastal Redland Bay and Wynnum where salt air is a factor.
Heat Pump
Newer to the market — expect 10–15 with regular filter cleans. Compressors are the wear part.
Warning Signs
Rusty hot water, popping/banging noises, longer heat recovery times, and any drip from the tank or TPR valve are red flags. Plan replacement before it fails.
Frequently Asked Questions
Should I replace before it dies?
Yes if it's over 10 years. Emergency replacements cost 20–40% more due to after-hours labour and forced brand availability.
Does harder water shorten lifespan?
Brisbane water is moderately soft, so scale isn't the main killer — anode corrosion is. Ipswich bore areas need more attention.