What Clients need to know:
Thermostatic mixer valves are used in a variety of commercial and domestic applications. These devices are used to accurately regulate and maintain the temperature of hot water delivery to your water outlets, this is to prevent scalding from your primary hot water unit. whether it’s storage hot water, solar or continuous flow hot water system. TMV’s can be used. Certain commercial premises such as restaurants, nursing homes, pre-schools, and Hospitals these devices are mandatory.
Clients should know there are differences between a Thermostatic mixing valve and a tempering valve when installed to you system.
Differences between a TMV and a tempering Valve:
Although very similar devices, a tempering valve is a 3-way mixing valve that is temperature actuated, and is used to temper a heated water supply by mixing the heated water with cold water to provide heated water at a lower temperature, normally 50ºC at one or more outlet fixtures.
A thermostatic mixing valve is a mixing valve in which the temperature of the water from the mixed water outlet is automatically controlled by a thermostatic element or sensor to a preselected temperature that is suitable for direct contact with the skin.
TMV’s are more accurate devices and control the temperature to within a higher specification and if a fault occurs shuts down the supply of hot water quicker.
Due to the application of these devices they have to be maintained and checked annually, to maintain efficient operation and safety. This is a mandatory requirement by manufactures and Australian standards.
We can carry out the installation, testing and repair of many brands of TMV’s.
Once tested by us, we will keep you informed every year and carry out preventive maintenance on your devices.
Servicing Thermostatic Mixing Valves:
TMV’s are to be Australian standard approved. AS4032.1. This Australian Standard then refers to AS4032.3 Requirements for field testing, maintenance or replacement of TMV’s. This regulation states that:
- TMV’s are to be Checked and serviced at intervals of not more than 12 months.
- A record of test results and repairs shall be provided in accordance with AS4032.3 Appendix B.
- A management system shall be established to ensure the devices are tested and maintained in accordance with relevant regulatory requirements, AS4032.3 and the manufacturer’s instructions.
- Thermostatic actuators shall be replaced at intervals not exceeding 5 years.
- The replacement and lubrication of dynamic ‘o’ rings and seals at intervals not exceeding 5 years or at shorter intervals as required by the manufacturer.
- TMV’s are required to be commissioned by a technically competent and qualified person.