Hot Water Compliance Upgrades Perth

WA Hot Water Regulations Explained

Western Australia has specific requirements for hot water systems to protect occupants from scalding and Legionella bacteria. Understanding these requirements helps you maintain a safe, compliant system.

The 60°C / 50°C Rule

WA regulations require:

• Storage temperature: 60°C minimum - This temperature kills Legionella bacteria that can grow in warm water
• Delivery temperature: 50°C maximum - Water at the tap must not exceed 50°C to prevent scalding

This dual requirement means most systems need a tempering valve to store water hot but deliver it at a safe temperature.

What is a Tempering Valve?

A tempering valve blends hot water from your storage tank with cold water to deliver water at a safe, controlled temperature. It’s installed on the hot water outlet and ensures water reaching taps doesn’t exceed 50°C.

When Tempering Valves Are Required

Tempering valves have been mandatory for new domestic installations in WA since 2012. Your system likely needs one if:

• Installed before 2012 without tempering valve
• Hot water at taps exceeds 50°C
• No tempering valve on hot water outlet
• Selling property and buyer requests compliance

Common Compliance Issues

Missing Tempering Valve The most common issue. Older systems often heat water to 60°C+ and deliver it directly to taps without temperature limitation.

Incorrect Temperature Settings Systems set below 60°C storage (bacteria risk) or delivering above 50°C (scald risk).

Relief Valve Discharge Temperature/pressure relief valves must discharge safely, not into enclosed areas or directly onto ground where people walk.

Installation Issues Systems installed in non-compliant locations or without proper clearances.

Compliance Certificates

We provide written documentation confirming:

• System has been checked against WA requirements
• All necessary work has been completed
• System meets current compliance standards

These certificates are useful for insurance, property sales, and your own records.

Property Sales and Compliance

When selling property, hot water compliance often comes up during building inspections. Having your system compliant before listing can:

• Avoid last-minute issues delaying settlement
• Give buyers confidence in the property
• Prevent negotiations over compliance costs

Call us on 08 7666 2806 to arrange a compliance assessment.