Why Your Electric Hot Water System Needs Servicing Every Two Years

Electric hot water unit blog

Why Your Electric Hot Water System Needs Servicing Every Two Years

Most homeowners don’t think about their electric hot water system until something goes wrong, usually when there’s no hot water left for the morning shower. But like any hardworking appliance in your home, your hot water unit needs regular servicing to keep running safely and efficiently.

As plumbers, we often see hot water systems fail years earlier than they should simply because they were never maintained. The good news? A routine service every two years can significantly extend the lifespan of your system and help you avoid expensive emergency replacements.

Your Hot Water System Is Like Your Car

Think about your car for a moment.

You wouldn’t drive it for 10 years without changing the oil, checking the brakes, or servicing the engine. Even if it still runs, neglecting maintenance slowly causes wear and tear that shortens its lifespan and increases the chance of breakdowns.

Your electric hot water system works exactly the same way.

It heats water every single day, often multiple times a day, under constant pressure and high temperatures. Over time, internal components wear out, valves can fail, and corrosion begins to develop inside the tank. Without servicing, small issues can turn into major failures.

Regular maintenance is the difference between getting 8 years out of a system or 15+ years.

What Happens During a Hot Water Service?

A professional hot water service involves checking the key safety and performance components of the unit, including:

* The sacrificial anode

* PTR valve

* Tempering valve

* CRV (Cold Water Expansion Valve)

* Duo valve

* Electrical components

* General tank condition and leaks

These components all play an important role in protecting both the unit and your home.

The Sacrificial Anode – The Hidden Lifesaver

Inside most electric storage hot water systems is a component called the anode rod, also known as a sacrificial anode.

Its job is to attract corrosive minerals in the water so the steel tank itself doesn’t rust from the inside out.

Over time, the anode deteriorates and eventually becomes ineffective. Once this happens, corrosion starts attacking the tank directly, and that often leads to the tank splitting or leaking.

Replacing a worn anode during routine servicing can add years to the life of your hot water system and potentially save thousands in premature replacement costs.

The PTR Valve – A Critical Safety Device

The PTR valve (Pressure Temperature Relief valve) is one of the most important safety components on your hot water system.

Its role is to release excessive pressure and temperature buildup inside the tank. Without a functioning PTR valve, pressure can become dangerous.

Over time, PTR valves can:

* Seize up

* Leak continuously

* Fail to operate correctly

* Build up with scale and debris

During servicing, plumbers test the valve to ensure it’s operating safely and replace it if necessary.

The Tempering Valve – Protecting Your Family

A tempering valve controls the temperature of water delivered to taps around the home, helping prevent scalding injuries.

In Australia, regulations require bathroom hot water temperatures to be limited for safety reasons.

When tempering valves begin to fail, you may notice:

* Water that’s too hot

* Fluctuating temperatures

* Reduced hot water performance

Routine servicing ensures the valve is functioning correctly and delivering safe water temperatures for your household.

What About the CRV?

The Cold Water Expansion Valve, commonly called a CRV, helps regulate pressure changes as water heats and expands inside the system.

As water heats, it naturally expands, creating additional pressure inside the tank. The CRV helps relieve that pressure and protect the system from unnecessary strain.

A faulty CRV can contribute to:

* Excess pressure buildup

* Valve leaks

* Premature wear on the hot water unit

Checking this valve during servicing helps maintain system stability and efficiency.

Don’t Forget the Duo Valve

Another often-overlooked component is the duo valve, which plays a major role during emergencies and maintenance situations.

The duo valve allows plumbers or homeowners to properly isolate the hot water system when repairs, servicing, or emergencies occur. If the valve becomes seized, damaged, or non-functional, isolating the system quickly can become extremely difficult, especially during a burst pipe, leaking tank, or valve failure.

We often come across old duo valves that:

* Won’t turn off properly

* Leak when operated

* Have become seized from lack of use

* Fail completely when urgently needed

The problem is, most people only discover the valve has failed during an emergency, when water is already going everywhere.

Routine servicing includes checking the duo valve to ensure it operates correctly and can safely isolate the system when required. It’s a small component that can make a huge difference in preventing water damage and reducing stress during unexpected breakdowns.

## The Cost of Skipping Maintenance

One of the most common things we hear is:

“It was working fine yesterday.”

Unfortunately, many hot water system failures happen with little warning.

Skipping servicing can lead to:

* Tank corrosion

* Water leaks

* Higher power bills

* Reduced hot water capacity

* Unsafe pressure issues

* Complete system failure

And usually, these problems happen at the worst possible time.

## How Often Should You Service Your Electric Hot Water System?

As a general recommendation, electric hot water systems should be professionally serviced every two years.

Homes with harsher water conditions or older systems may benefit from more frequent checks, especially for anode replacement.

Final Thoughts

Your hot water system is one of the hardest-working appliances in your home. A simple maintenance service every two years can improve efficiency, maintain safety, and dramatically extend the life of the unit.

Just like servicing your car keeps it running reliably for longer, servicing your hot water system protects your investment and helps you avoid costly breakdowns.

If your system hasn’t been checked in a few years, now is the perfect time to book a professional service before small issues become expensive problems.