How long do hot water systems last? Expected lifespan by type, signs of failure, and when to replace.
Electric storage tanks last 8 to 12 years on average. Hard water areas like parts of the Central Coast can shorten this to 7 years. The most common failure point is the anode rod. Once it corrodes completely, the tank itself starts to rust from the inside. Replace the anode every 5 years to extend tank life.
Gas storage tanks have a similar lifespan of 8 to 12 years. Gas continuous flow units last much longer at 15 to 20 years because they have no tank to corrode. The heat exchanger is the main wear component in continuous flow systems. Annual servicing keeps them running efficiently.
Heat pump systems last 10 to 15 years. The compressor is the most expensive component to replace. Regular servicing extends the life of all systems. Keep the outdoor unit clear of debris and ensure good airflow around it. A yearly check of the anode, valves, and connections can add 3 to 5 years.
Rusty water, rumbling noises from the tank, water pooling around the base, reduced hot water volume, and the system taking longer to reheat are all warning signs. If your system is over 10 years old and showing any of these signs, start planning a replacement before it fails completely.
If your system is under 8 years old and the repair cost is less than half the replacement cost, repair makes sense. If it is over 10 years old or needs a major component like a tank or compressor, replacement is usually the better investment. We can inspect and give you honest advice.
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How Old Is Your Hot Water System?
Free inspection and honest advice on repair vs replace. Licensed plumbers serving the Central Coast and Northern Sydney.