You can expect your tempering valve to last somewhere between 5-8 years. However, regular inspections and maintenance will prolong the life of your tempering valve and identify problems before they can do any damage. Many tempering valve-related problems stem from a build-up of debris from your water heater.
Water heaters should be flushed annually to prevent a build-up in your tank, and this will help prevent a build-up in your tempering valve as well. Furthermore, you can have an inline filter installed. This prevents debris from entering your hot water system in the first place!
Older hot water systems are also prone to rust and build-ups which can affect your tempering valve.
