I will soon be buying a new water heater for my home. I want to set the heater to keep the stored water at least 140 degrees Fahrenheit (60 degrees Celsius), and use a thermostatic mixing valve to deliver at most 120 degrees F water to the rest of my house (49 degrees C).
I'm wondering if there are any disadvantages to a thermostatic mixing valve. In particular, do they ever emit loud noises such as a "clunk" when water starts flowing?
(It may well be that there are not really any disadvantages. If so, great!)
If there are disadvantages, advice on how to mitigate them would be welcome.
Note: the water in my home is as soft as it gets. (I live near Seattle, and our water is pretty much melted snow from the Cascade mountain range. The water company actually adds minerals to the water during processing, as water this soft can be slightly acidic and nobody wants water to dissolve plumbing over time.) So, mineral buildup inside the mixing valve should be minimal.