Frequently Asked Questions about Tempering Valve

A tempering valve will typically last 5-8 years. Typically it’s not a part that is repaired, with a full replacement the best option when something goes wrong.

Performance and efficiency can gradually degrade, with regular hot water servicing an ideal way to assess any potential issues. Although this might not extend the life of a tempering valve, it will help for safety and hot water longevity.

Commercial properties and large scale buildings like nursing homes and schools often benefit from an alternative valve, the thermostatic mixing valve (TMV).

A TMV operates in the same way as a tempering valve, however its delivery is faster and more accurate. Its temperature control also operates within 1°C, instead of 3°C, allowing for precise hot water delivery.

Anyone can have a TMV installed, however, the increased price means it really isn’t a necessity. So if your hot water isn’t supplying a business, aged care centre, hospital or school, you can rely on a regular tempering valve.

In a worst case scenario a malfunctioning tempering valve will not be able to properly control the temperature of your water.

That could mean it either fails to cool down hot water, or it provides water that’s too cold. Either way, the internal valves are faulty and you’re not getting appropriate temperature control.

Most tempering valves do have an automatic thermal shut-off feature if there’s an issue with the hot or cold inlet supplies. This will most likely negate the above concerns by immediately shutting off your water. As a result, you’ll need to contact a plumber for a timely hot water service.