A tempering valve is a crucial component in plumbing systems, designed to mix hot and cold water to deliver water at a safe and consistent temperature. By regulating the water temperature, tempering valves protect against potential burns, making them especially important in homes with young children or elderly residents, as well as in public facilities.

 

Keep reading to explore how tempering valves work, the different types available, installation tips, and more. 

 

What is a Tempering Valve?

A tempering valve is a device used in plumbing systems to mix hot and cold water, ensuring a consistent and safe water temperature at the point of use. It functions by automatically adjusting the mix of hot and cold water based on the set temperature, typically set at 50°C. This maintains the output water temperature within a safe range, even if there are fluctuations in the supply temperatures. 

 

Key Benefits of Installing Tempering Valves

Installing tempering valves offers significant safety benefits, foremost among them being the prevention of burns and scalds. By regulating water temperature within a safe range, they ensure that hot water does not reach dangerous levels that can cause serious injuries.

Tempering valves also help properties comply with building codes and safety regulations, which often mandate their use to prevent accidents. 

 

How Do Tempering Valves Work?

Tempering valves are designed to automatically mix hot and cold water to achieve a pre-set temperature. This process begins when water enters the valve through inlets for hot and cold water. Inside the valve, a thermostatic element senses the temperature of the mixed water. If the temperature deviates from the set point, the element expands or contracts, adjusting the proportion of hot and cold water being mixed. This ensures that the output water temperature remains within a safe range, even if the supply temperatures fluctuate.

 

The Mechanics Behind the Valve

The internal workings of a tempering valve involve several key components that collectively ensure precise temperature control. The main components include:

  • Inlets for hot and cold Water: These are the entry points where hot and cold water enter the valve.
  • Thermostatic element: This is the core component responsible for temperature sensing and regulation. It expands or contracts based on the mixed water temperature.
  • Balancing piston: Connected to the thermostatic element, this piston moves to adjust the flow of hot and cold water, ensuring the desired mix.
  • Mixing chamber: This is where hot and cold water are blended to the target temperature.
  • Outlet: The mixed water exits through the outlet at the regulated temperature.

 

Maintenance Tips for Longevity

Proper maintenance of tempering valves is essential to ensure they function efficiently and have a long service life. Here are some practical tips:

  • Periodically check the valve for any signs of wear or damage. Look for leaks or corrosion around the valve body and connections.
  • Clean the valve and its components regularly to remove any sediment or mineral buildup.
  • Use a thermometer to check the output water temperature periodically. If the temperature is not consistent with the set point, the valve may need adjustment or replacement.
  • Some tempering valves require occasional lubrication of moving parts. Refer to the manufacturer’s instructions for specific recommendations.
  • Over time, parts like the thermostatic element and O-rings can wear out. Replace these parts as needed to maintain optimal performance.
  • At least once a year, have a professional plumber inspect and test the valve. They can identify and fix issues that might not be apparent to the untrained eye.

 

Types of Tempering Valves

Tempering valves come in various types, each tailored to specific applications and environments. Understanding the differences between these types is essential for selecting the right valve for a particular plumbing system.

 

Orange Cap Tempering Valves

Orange cap tempering valves are commonly used in residential hot water systems. They are designed to deliver water at a safe and consistent temperature for domestic use, such as bathing, washing dishes, and laundry. These valves are typically used on soar hot water systems or continuous flow gas system as they handle temperature and pressure fluctuation well. 

 

Blue Cap Tempering Valves

Blue cap tempering valves are suited for Electric style hot water systems in residential application. This is because they are great at handling consistent pressure and heat coming from the hot water cylinder. 

 

Green Cap Tempering Valves

Green cap tempering valves are specially designed for systems involving renewable energy sources, such as solar water heating systems. These valves are designed to handle the unique characteristics of renewable energy-generated hot water, including fluctuations in temperature and pressure. 

 

Black Cap Tempering Valves

Black cap tempering valves are suited for commercial environments where higher water temperatures are often required, such as restaurants, hotels, and hospitals. They have a broader temperature range compared to residential models, and are capable of withstanding high demand and frequent use.



Installation and Adjustment of Tempering Valves

If you’re considering installing or adjusting a hot water tempering valve, follow these steps to ensure compliance with regulations and proper functioning for optimal performance and safety.

 

Step-by-Step Installation Guide

  1. Before beginning the installation, shut off the water supply to the area where the tempering valve will be installed.
  2. Select a suitable location for the tempering valve, preferably close to the water heater and accessible for maintenance.
  3. Cut the hot and cold water supply pipes to the appropriate length, ensuring they are clean and free of debris.
  4. Attach the tempering valve to hot water and cold water supply pipes using appropriate fittings and connectors. 
  5. Connect the outlet pipe from the tempering valve to the plumbing fixtures or distribution system.
  6. Secure the tempering valve to the wall or support structure using mounting brackets or straps.
  7. Check all connections for leaks by slowly turning on the water supply and inspecting for any signs of leakage.
  8. Once the valve is installed and tested, adjust the temperature setting to the desired level using the temperature adjustment dial or knob on the valve.

 

Adjusting Your Tempering Valve for Optimal Performance

To adjust a tempering valve for optimal performance, follow these steps:

  1. Locate the temperature adjustment mechanism on the valve, typically a dial or knob with temperature markings.
  2. Use a screwdriver or wrench to turn the adjustment mechanism to increase or decrease the temperature.
  3. Turn on hot water fixtures and monitor the water temperature to ensure it is within the desired range.
  4. If the water temperature is too hot or too cold, troubleshoot potential issues such as sediment buildup, faulty components, or improper installation.
  5. If adjustments do not resolve the issue, contact a licensed plumber for further inspection and repairs.

 

Hot Water Tempering Valve Compliance

Hot water tempering valves are mandated by legal standards and building codes to ensure safety in plumbing systems. Standards such as the International Plumbing Code (IPC) and local building codes outline specific requirements for temperature control devices to prevent burns. Compliance with these standards is essential to meet safety regulations and protect occupants from hot water-related injuries.

 

Frequently Asked Questions About Tempering Valves

 

H3: What temperature should my tempering valve be set at in Australia?

In Australia, tempering valves are typically set at 50 degrees Celsius to prevent scalding while still providing hot water for comfort. This ensures a balance between safety and usability.

 

How often should a tempering valve be replaced or serviced?

Tempering valves should be replaced every 5 years to maintain optimal performance and maintain manufacturers warranty. Neglecting maintenance can lead to malfunctions, compromising water temperature control and increasing the risk of scalding or other safety hazards.

 

Are tempering valves required in all Australian homes?

In Australia, tempering valves are required in all new homes and renovated properties with hot water systems. 

 

When to Call a Professional Plumber

Tempering valves play a vital role in maintaining safe water temperatures, and any problems should be addressed promptly by a trained expert. Professional plumbers have the knowledge, experience, and specialised tools needed to diagnose and repair tempering valve issues accurately. Attempting DIY repairs can lead to further damage or compromise the valve’s effectiveness, risking safety and compliance with regulations. 

Whether it’s installation, adjustment, maintenance, or repairs, trusting a professional plumber ensures the proper functioning and longevity of tempering valves in residential and commercial properties.

 

My Home Plumbing: Your Trusted Plumbing Experts

At My Home Plumbing, our team of plumbing professionals is here to help you safeguard your family and property with reliable tempering valve installation and solutions. Contact us today for peace of mind.