Is Your Hot Water Safe? The Importance of Temperature Control Devices

If your storage Hot Water Service (HWS) or Instantaneous Unit is more than 5 years old, you might be putting yourself and your family members at risk.

Most Temperature Control Device (TCD) manufacturers recommend replacing your valve every 4 to 5 years.

What Are Temperature Control Devices?

Temperature Control Devices are designed to maintain the hot water temperature at a safe level as it comes out of a bathroom outlet.

TCDs mix hot water from your HWS or Instantaneous Unit with cold water to provide hot water at a lower, safer temperature. If you look at the graph below, you’ll understand why ensuring your TCDs are in good working order is crucial.

This graph is sourced from the Australian Building Codes Board (ABCB) Plumbing Code Development Research.

If you have young children or elderly relatives living with you, just a few seconds of exposure to hot water that’s too hot could make a world of difference in terms of safety.

Types of Temperature Control Devices

There are two main types of TCDs:

• Thermostatic Mixing Valves (TMVs)
• Tempering Valves

Tempering valves are the most commonly installed device in homes. They are typically located next to your HWS and have a color-coded cap for easy identification:

• Yellow Cap – Suitable for storage hot water systems.
• Orange Cap – Suitable for solar and instantaneous hot water systems.

Knowing which cap you have and informing your plumber ahead of time can speed up the installation process, reducing the time you’re without hot water.

Stay Safe with Prime Plumbing

If you need more information or have questions about TCDs, you can call 0475 407 670, email us at admin@primeplumb.com.au, or fill out our online enquiry form. We’ll get back to you ASAP to ensure your hot water system is safe and efficient.