This relates to the function of the element used to control the TMV. Aquablend uses a Thermostatic element that is recommended to be replaced every 5 years. Recently, after the release of Coroners findings at the Barker inquest, where Thermoscopic element technology is used, the manufacturer of the TMV must state a maximum replacement interval of no more than 3 years. This adds significantly to the ongoing maintenance costs of Thermoscopic type TMV’s using ” whole of life ” cost analysis.
Well, The thermostatic valve mixes the hot and cold water to your pre-selected temperature. It reacts instantly to any changes in the pressure or temperature of the water supply by re-adjusting the mix of hot and cold water. I am not a professional in this field, but I had my valve break not so long ago. Happily, I found some excellent plumbing specialists who managed to fix it for me. They explained how the whole water system works and what I should do to avoid breaking it again.