This Faucet Shows When the Water’s Hot (or Cold) - Today's Homeowner

When the water is cool, a ring on this faucet lights up blue. When it starts to get warm, it turns to magenta and when hot it turns red.

from Danny Lipford - Home Improvement - DIY - Videos https://www.todayshomeowner.com/video/this-faucet-lets-you-know-when-the-waters-hot-or-cold/
Power Washing Rehoboth