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Water Heaters

Predicting water heater or boiler failure isn’t always easy, but there are things you can look out for, so you know when your system is coming to the end of its life.


After years of service, lots of things can begin to go wrong with the parts in your water heating system. Parts wear out, corrosion develop, and tanks can crack. For most makes of tank heaters, you can normally expect a life span of around 10 years.

So, knowing the age of your water heater is key to proactive replacement. If you don’t know when yours was installed or if you recently purchased your home, you could verify the date by checking the serial number label. Manufacturers note the month and year each unit is produced within the serial number, so you can refer to your water heater manufacturer’s website to identify your model’s code and confirm its age.

This could be due to a failing heating element, which a professional plumber can diagnose and repair. But it could also mean that mineral sediment has coated and hardened on the bottom of your tank, including the heating element. This tends to happen around or after the ten-year mark and is a sign that your water heating system could be on its way out.

Regular servicing of your water heating system, including checking the anode rod and replacing it if necessary, will prevent tank corrosion.  If you haven’t had the system regular serviced, then tank corrosion will be evident in the form of rusty coloured water coming from your taps.

You can confirm the problem is in your water heater and not your pipe system by getting a plumber to flush your water heater tank, another routine maintenance task, and checking to see if the drained water is rust coloured. If your water heater is rusted out, it needs to be replaced before it springs a leak.

Even if none of the above symptoms are evident, water heating could also be on its way out if there is a constant loud banging noise when it’s heating up.  As sediment in the system settles and hardens, it forces your water heating system to work harder, and that can lead to rapid expansion of the tank for example. If you hear constant clanking coming from your tank, it’s time to get a new one.

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