Tempering Valve & TMV Servicing | Compliance and Scald Prevention

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The tempering valve is one of the most critical safety devices in your home or commercial hot water system. Its primary job is to protect people—especially children and the elderly—from severe scalding injuries. At Your Choice Plumbers, we specialize in the inspection, testing, repair, and replacement of all types of tempering valves and Thermostatic Mixing Valves (TMVs) to ensure complete safety and compliance.

Why Tempering Valves are Mandatory

Hot water storage systems are required to store water at a minimum of 60 Deg. Celsius to prevent the growth of harmful Legionella bacteria. However, water above 50 Deg. causes third-degree burns very quickly.

Tempering and TMV valves solve this problem by automatically mixing stored hot water with cold water before it reaches your tap, ensuring a safe, regulated temperature at the fixture.

The Legal Requirement (AS/NZS 3500)

According to the Australian Plumbing Standards, all new hot water systems must have a tempering valve installed to deliver water at a maximum of 50 Deg. to all sanitary fixtures (baths, showers, basins) used for personal hygiene.

Our Specialized Temperature Control Services

1. Domestic Tempering Valve Service (Homes & Residential)

1. Domestic Tempering Valve Service (Homes & Residential)

These valves are common on most modern homes with storage hot water systems.

Standard (Mains Pressure) Valve: Limits output temperature to 50 Deg. Over time, scale and debris can affect the valve’s accuracy, causing temperature fluctuations.

Unique to Solar Systems: Domestic solar tempering valves are specialized. They are designed to safely handle the extremely high incoming water temperatures that solar systems can generate, ensuring a safe 50 Deg. output even when the solar booster overheats the tank.

Caption: The standard setup: A compliant tempering valve clearly installed on the side of a domestic hot water storage system.

Plumber checking hot water outlet temperature levels using digital tool - your choice plumbers

2. Advanced System Integration and Built-in Safety

We understand and service modern systems with integrated safety features, recognizing their specific external compliance needs:

  • Continuous Flow Units (Instantaneous): These units deliver water at a specific temperature:
  • 50°C Pre-Set Units: Models like the Rinnai Infinity 26 often come pre-set for a maximum 50 Deg. delivery, meaning they meet the safety standard without requiring an external tempering valve.
  • 60°C Pre-Set Units: utilise digital bathroom controllers to regulate the temperature precisely at the point of use. This technology allows the unit to maintain the 60°C supply for laundry/kitchen while achieving the safe 50°C maximum for the bathrooms, making the bathroom supply compliant without requiring a secondary external tempering valve.
  • Inbuilt Mixing Spindles (Storage Systems): Certain advanced storage systems, such as the Aquamax 390SS, feature an inbuilt thermostatic mixing spindle integrated directly into the cylinder for temperature regulation.
  • Compliance Mandate: However, this internal technology is not compliant by itself. Regulators like the Victorian Building Authority (VBA) still require the installation of an external tempering valve to be correctly fitted and calibrated. This external valve serves as the mandatory safety backup to meet the Australian Plumbing Standards (AS/NZS 3500.4) at the fixture.

 

3. Commercial Thermostatic Mixing Valves (TMV) in Apartment Buildings

3. Commercial Thermostatic Mixing Valves (TMV) in Apartment Buildings

TMVs – Thermostatic Mixing Valves are high-performance valves commonly installed in newer high-density residential buildings (city apartment blocks) that use a common hot water circulating supply system. This is highly common in areas like the Docklands Vic 3008, apartments hub of Melbourne.

Location and Access:These TMVs are typically located within the ceiling space of individual apartments, usually accessed through a panel in the bathroom or hallway ceiling. We specialize in accessing and servicing these concealed valves.

 

 

Plumber at Work

For expert TMV, solar, or standard tempering valve servicing and repair, contact Your Choice Plumbers today.

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When you call, our team listens. We’ll discuss your concerns and pair you with a Your Choice specialist. We respect your schedule with guaranteed 2-hour arrival windows—no waiting around all day for a plumber to show up.

Step 1: Professional Consultation

When you call, our team listens. We’ll discuss your concerns and pair you with a Your Choice specialist. We respect your schedule with guaranteed 2-hour arrival windows—no waiting around all day for a plumber to show up.

When you call, our team listens. We’ll discuss your concerns and pair you with a Your Choice specialist. We respect your schedule with guaranteed 2-hour arrival windows—no waiting around all day for a plumber to show up.

After a thorough assessment, we explain the "why" behind the issue and provide clear solutions with upfront pricing. You stay in total control of the budget; no work starts until you’ve made a Your Choice informed decision.

Step 2: On-Site Diagnosis & Options

After a thorough assessment, we explain the "why" behind the issue and provide clear solutions with upfront pricing. You stay in total control of the budget; no work starts until you’ve made a Your Choice informed decision.

After a thorough assessment, we explain the "why" behind the issue and provide clear solutions with upfront pricing. You stay in total control of the budget; no work starts until you’ve made a Your Choice informed decision.

We execute the repair to the highest Australian Standards, leaving your home spotless. We handle all compliance paperwork and mobile payment on-site, backed by the Your Choice Property Protection Guarantee for total peace of mind.

Step 3: Precision Completion

We execute the repair to the highest Australian Standards, leaving your home spotless. We handle all compliance paperwork and mobile payment on-site, backed by the Your Choice Property Protection Guarantee for total peace of mind.

We execute the repair to the highest Australian Standards, leaving your home spotless. We handle all compliance paperwork and mobile payment on-site, backed by the Your Choice Property Protection Guarantee for total peace of mind.

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