Here is a fact I bet you did not know! Every five years, your hot water units should be serviced. And no, it’s not one of those sneaky services designed to charge you an arm and a leg for no reason. It is an essential service to replace two of the more crucial components of the hot water system. 

The sacrificial anode and the hot water valves.

Why? Read on!

What is the sacrificial anode?

The sacrificial anode protects your hot water tank from rust. When it is fully worn out or beginning to corrode, a natural result of its use, electrons in the water begin to rust the hot water tank. Replacing the anode significantly extends the life of your hot water tank – and it may even double it!

Old Sacrificial Anode and Replacement Sacrificial Anode - replaced during hot water unit service

Demonstrating its significant importance, some warranties stipulate that tank maintenance and anode change must be completed otherwise the warranty is void.

What is a hot water valve?

Hot water valves progressively fatigue over time and do not operate to peak effectiveness. These components may be small in size, but don’t underestimate their importance!

Pressure and Temperature Relief Valve

This valve, also known as a TPRV, regulates the pressure and temperature in your hot water tank. By releasing water when the pressure reaches a certain level, it reduces stress on your hot water tank. The older it gets, the stiffer and less sensitive it becomes which diminishes functionality. This increases the expansion and contraction of the hot water tank, leading to greater fatigue and a shorter tank life.

Cold Water Expansion Valve

This valve sits on the inlet of the tank. Also known as ECVs, cold water expansion valves are designed to be activated at lower functioning pressure than a TPRV and release cold water instead of hot water when the hot water storage system becomes pressurised. They become less effective with time.

Plumber performing hot water tank service

Tempering Valve

Working to regulate the temperature of the hot water to 50 degrees +- 3 degrees. The tempering valve should be replaced every 5 years – but as a minimum, its filters should be cleaned and temperature reset.

Pressure Limiting/Pressure Reduction Valve

This valve limits or regulates incoming water pressure to ensure it does not go above 500KPA. When operating effectively, it works to extend the life of your hot water unit and downstream tapware, fixtures, and appliances. Be aware, if the water inlet pressure does exceed 500KPA, your system’s warranty may be void. Don’t take the risk!

Duo Valve or Isolation/Non-Return Valve

Designed as a shut-off point for the water supply into the hot water unit, this valve prevents hot water from being pushed into cold water. Ultimately, this is a health and safety issue and works to save energy by preventing hot water from escaping.

Why does a hot water system need servicing?

Investing in a reliable and energy-efficient hot water tank is important, but you can now see that investing in the maintenance of it is extremely important, too.

By carrying out regular hot water servicing, Brisbane homeowners can:

  • Ensure the hot water system operates at optimal efficiency
  • Extend the system’s lifespan, and possibly double it
  • Avoid costly repairs or the need to completely replace the system prematurely
  • Have peace of mind that safety mechanisms such as pressure relief valves are in good working order to prevent accidents or gas leaks.

So don’t wait until something goes wrong! When you need hot water system servicing, Brisbane professionals Salmon Plumbing are here to assist – contact us today.