Do I Need a Tempering Valve on My Hot Water Service?

If you’re installing a new hot water system or replacing an existing one, one of the most common questions homeowners ask is: “Do I need a tempering valve?”

In most cases, the answer is yes.

A tempering valve is an important safety device that helps prevent scalding by controlling the temperature of the hot water delivered to bathrooms and other sanitary fixtures.

What Is a Tempering Valve?

A tempering valve is a plumbing valve installed on the hot water line that mixes hot water from your hot water system with cold water before it reaches your taps.

Its purpose is to reduce the temperature of the water supplied to bathrooms, showers, baths and hand basins to a safer temperature.

While your hot water system may heat water to 60°C or higher, a tempering valve typically limits the delivery temperature to 50°C in domestic homes.

Why Are Tempering Valves Required?

Australian plumbing regulations require stored hot water to be heated to at least 60°C to help control harmful bacteria such as Legionella.

However, water at 60°C can cause serious burns within seconds.

A tempering valve allows you to:

• Store water at a safe temperature inside the hot water system
• Reduce the risk of scalding
• Meet Australian plumbing regulations
• Protect children and elderly occupants

Do All Hot Water Systems Need a Tempering Valve?

Storage Hot Water Systems

In most Australian homes, yes.

Gas, electric, solar and heat pump storage hot water systems generally require a tempering valve when supplying bathrooms and sanitary fixtures.

Continuous Flow Hot Water Systems

Many continuous flow systems, such as certain models from Rheem and Rinnai, have built-in temperature control and can often be set to deliver water at 50°C.

Depending on the model and installation, a separate tempering valve may not be required.

However, this should always be confirmed by a licensed plumber during installation.

Signs Your Tempering Valve May Need Replacing

Like any plumbing component, tempering valves can wear out over time.

Common signs include:

• Water temperature fluctuating
• Water becoming excessively hot
• Reduced hot water flow
• Inconsistent shower temperatures
• Leaking valve
• No hot water at some fixtures

If you’re experiencing any of these issues, it may be time to have your tempering valve inspected.

How Long Does a Tempering Valve Last?

Most tempering valves typically last between 5 and 10 years, depending on:

• Water quality
• Usage
• Maintenance
• Manufacturer

Regular servicing can help extend the life of the valve and ensure it continues to operate correctly.

Why Choose Better Plumbing Solutions?

At Better Plumbing Solutions, we provide:

✔ Tempering Valve Installations
✔ Tempering Valve Repairs & Replacement
✔ Hot Water System Installations
✔ Continuous Flow Hot Water Upgrades
✔ Gas & Electric Hot Water Systems
✔ Residential & Commercial Plumbing Services

We service Melbourne and surrounding suburbs and can advise whether your hot water system requires a tempering valve to meet current plumbing regulations.

Contact Better Plumbing Solutions

Need a tempering valve installed, replaced or checked?

0468 582 686

Better Plumbing Solutions is your local hot water specialist, providing hot water repairs, replacements and compliance plumbing services throughout Melbourne.