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Hot Water System Parts

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Understanding your Electric Hot Water System Parts in Brisbane, Gold Coast, Logan, Ipswich, Moreton Bay, Redlands and Sunshine Coast

Have you ever wondered what goes on inside your hot water heater? Understanding your hot water system can be a complex process due to the sheer amount of components working together to deliver your perfect temperature showers. Here we have our experts break down these parts into easy, bite-size pieces so you can make informed decisions about the health of your system. This guide will equip you with the knowledge you need to understand your hot water system parts.

We are available 24/7 for hot water emergencies in the Greater Brisbane area. Call now on 1300 054 488 – We Can Be There Today!

Financing options are also available. If you prefer to send an enquiry contact us here. Or book online below.

Good Better Best Options for Every Home and Budget

More Choice. Clear Options. The Same Trusted Fallon Service.

Every home, job and budget is different. That’s why Fallon Solutions now offers Good, Better, Best* options across our home trade services.

Instead of a one-size-fits-all recommendation, your technician will assess the job, explain what they’ve found, and provide clear options so you can choose the solution that best suits your home, your needs and your budget.

Whether you need a safe essential fix, a longer-term upgrade, or the most comprehensive solution available, you stay in control.

How Good Better Best works:

  • Good: A safe, practical option to get the issue fixed.
  • Better: A stronger solution designed for improved performance, reliability or efficiency.
  • Best: A premium option offering the highest level of comfort, durability, efficiency or warranty coverage.

With Fallon Solutions, you’ll receive clear advice, upfront options and the same trusted workmanship backed by our limited lifetime labour warranty.

*T&Cs apply

Need a Hot Water specialist?

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Our local tradies service Greater Brisbane, Gold Coast & Sunshine Coast.

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Common Electric Hot Water System Parts

Your hot system is a complex network of parts, which all work together to provide safe and comfortable hot water for your home or business. Understanding these parts can be tricky, especially in terms of how they work to provide your hot water. That’s where we our professional hot water plumbers come in. We’re here to help you understand your system through knowledge and expertise. Here we will talk you through the function of these parts, where you’ll find them, common issues and average lifespan.

  1. Hot water outlet
  2. Mains power isolation switch
  3. Temperature pressure relief valve
  4. Tempering valve
  5. Duo and pressure limiting valve
  6. Cold water expansion control valve
  7. Relief drain connection
  8. Cold water connection
  9. Mains power connection
  10. Concrete ripple slab

Don’t risk DIY fixes, if you have identified your part is malfunctioning call our team today to arrange a professional hot water system repair on 1300 054 488.

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Breaking Down Hot Water System Parts

What is it: The hot water outlet is the pipe where heated water exits the tank and travels to your taps and appliances.

Commonly found: This part is typically found at the top of the hot water tank.

Common issues: Corrosion and loose connections can cause leakages.

Average lifespan: 10-20yrs.

What is it: This is an electrical switch that is able to completely shut off the power to the hot water system, which is essential for safety during emergencies or maintenance.

Commonly found: You will typically find this isolation switch on the wall near the hot water system.

Common issues: Loose connections and switch failure may result in an inability to isolate power.

Average lifespan: 10-20yrs.

What is it: If the temperature or pressure exceeds safe limits, this essential safety device will automatically release water from the tank. This will protect your system from dangerous explosions.

Commonly found: The TPRV is located on the side of the tank and had a discharge pipe that leads outside.

Common issues: Leaking due to debris or corrosion, failure to open when needed.

Average lifespan: 5-10yrs.

What is it: Delivers a safe temperature to your taps and appliances by mixing hot water from the tank with cold water.

Commonly found: On pipework leading to the hot water outlet, near the tank.

Common issues: Leaks and blockages, failure to mix water properly which results in water thats too hot or too cold.

Average lifespan: 10-15yrs.

What is it: This is a combination valve that services two purposes:

  1. Limits the pressure within the hot water system to a safe level.
  2. Prevents back-flow of hot water into the cold water supply line.

Commonly found: This part is typically found installed on the cold water inlet pipe leading into the system.

Common issues: Valve failure which allows back-flow, failure to limit pressure which can lead to high pressure and parts damage.

Average lifespan: 10-15yrs.

What is it: Protects your system and your plumbing from damage caused by water expansion upon heating. It will allow a small amount of water to escape during expansion to ease pressure.

Commonly found: Installed on the cold water line near the tank.

Common issues: Leaking and failure to open, leading to excessive pressure.

Average lifespan: 5-10yrs.

What is it: This is where water discharged from by TPRV or expansion control valve will travel through. Allowing excess to be disposed to a safe place outside your home.

Commonly found: Connected to the TPRV and/or expansion control valve and it usually leads to a drain outside.

Common issues: Pipe blockages preventing proper drainage.

Average lifespan: Typically lasts the life of the system.

What is it: The pipe that supplies cold water to your hot water system.

Commonly found: Typically you’ll find this connected to the bottom of the hot water tank.

Common issues: Leaks and blockages prevent proper functioning.

Average lifespan: Typically lasts the life of the plumbing.

What is it: The electrical connection that supplies power to the heating elements within the hot water system.

Commonly found: Usually at the bottom of the tank, this part will be connected to the thermostat and heating elements.

Common issues: Loose connections and faulty wiring at common problems with this part.

Average lifespan: Typically lasts the life of the system.

What is it: The ripple design of this slab provides extra strength as it’s purpose is to support the entire hot water system.

Commonly found: Underneath the hot water tank.

Common issues: Cracking and deterioration over time, commonly due to ground shifts and age.

Electric Hot Water System Parts Replacement & Troubleshooting

Now you’re able to correctly identify the common parts found on your electric hot water system, you can monitor for any issues now and in the future. While it can be tempting to DIY replacements and repairs to your hot water system, it can be extremely dangerous without proper training and tools. Risk of burns and electric shocks are just a few of the risks you could encounter. Our professional hot water plumbers have the expertise, qualifications and tools to ensure safe, efficient and reliable replacements and repairs. By safely repairing or replacing broken components, we can ensure your system is working efficiently and to-code. Put your home or business in safe hands with the team from Fallon Solutions, offering the supply of parts and repair of your system.

24/7 Emergency Hot Water Plumbers

Our master plumbers are available 24/7 for emergency services in Greater Brisbane. Offering you peace of mind in stressful circumstances, you can trust that a Fallon Solutions plumber will be there promptly when you need them.

Plumbing emergency services are available to residents of:

  • Brisbane
  • Ipswich
  • Logan
  • Moreton Bay
  • Redlands

For residential or commercial plumbing emergencies, call us on 1300 054 488.

Fallon Solutions Hot Water Plumbers

Same-Day Service: Our plumbers are available across Greater Brisbane, the Gold Coast and the Sunshine Coast so you never have to look far for our trusted technicians.

24/7 Emergency Hot Water Plumbing Service: We are proud to offer emergency plumbing to residents of Greater Brisbane.

Excellent Customer Service: With thousands of 5-star reviews, we know the importance of quality customer service. Let us guide you through hot water installation, repairs and services.

Highly Qualified & Knowledgable Hot Water Plumbers: Our team of hot water specialists are experts in their field. With up-to-date qualifications, insurance and extensive knowledge.

We aim to provide you with fast, reliable service with minimal impact to your day. Contact Fallon Solutions on 1300 054 488 or complete our online booking enquiry here.

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Afshin Waqas
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Ac tech Nick was great
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Jesse Ellis
1 October 2026
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Damien P from Fallon Solutions was excellent from start to finish. I was running about ten minutes late when he arrived, and he was kind enough to wait for me, which I really appreciated. Once I got there, he came straight in, got down to business and took the time to properly understand the issue. Damien was extremely thorough, checking the meter, switchboards and even getting up into the ceiling to locate the fuses and trace the problem. He clearly explained what the issue was, what would be required to fix it, and organised a quote on site to be sent through to the landlord for approval. He then worked with me to find a suitable date and time to come back and have everything rectified. The whole process was smooth, friendly and professional. Damien was helpful, informative and clearly knows his stuff. I really appreciated the level of care and professionalism and would happily recommend him and Fallon Solutions.
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Rhiannon Darcy
1 October 2026
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Chris R from fallon's was wonderful! So informative, did a full assessment of our dishwasher and had it fixed in no time! First time using Fallon's will definitely be using this wonderful service again!
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Edna Budd
1 October 2026
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Technician courteous and efficient. Pleasure to deal with.
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Jayden Hellyar
30 September 2026
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Air con technician Nick was great!
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Daniel Tse
30 September 2026
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David Brown has been provided excellent service to me for my home security system. He is very friendly, thorough and very professional. I appreciate his help.
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Richard Scott
30 September 2026
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Fantastic work, photos and video of what needed on pipe reline and ten years warranty on work 👏
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Pat Anderson
29 September 2026
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Well done good job.
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WT
29 September 2026
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Damien is very professional, thorough and friendly. Feel we are in safe hands when it comes to electricity work. Wayne is very professional, reliable and efficient, he answered so many of my queries patiently and clearly re the newly installed hot water system..
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Suzie Rodgers
28 September 2026
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Chris Radcliffe from Fallon Sollutions, this morning was so excellent at his job. He was very knowledgeable about every detail that caused my washing machine to flood and malfunction. He went the extra mile and pumped all the dirty water out as well, while making me feel listened to, important and valued. He was super friendly too. I highly recommend Chris and hope to see him again if I need to.

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Terms and Conditions

  • This offer is valid for domestic customers only.
  • While this offer cannot be combined with any other offer, it can be used in conjunction with a 15% Home Protection Plan member discount.
  • This offer does not apply to travel fees.
  • This offer is applicable during normal business hours, not after-hours call-outs.
  • The homeowner must be present during the hot water system replacement.
  • Not applicable for under sink hot water purchases