It can take a while for water running from the faucet to get hot. Yeah, you can wait around with your finger under the water, but it would be a lot easier if you could see when it’s finally hot. This clever DIY temperature indicator does just that.
This video from the Shake the Future YouTube channel shows you how to create a simple temperature indicator for your faucet that doesn’t require any special tools, batteries, or electronics. All you need is some clear nail polish and some thermochromatic pigment that loses its color when it gets heated up. Remove the nozzle from your faucet, paint it red, and let it dry. Then mix the thermochromatic pigment with the clear nail polish, paint it over the red, and let it dry. The nozzle should now look blue in its neutral state. When you attach it back on your faucet and try to run some hot water, the nozzle will turn red when it finally heats up. Now you can do other things in the kitchen while you wait and know exactly when it’s ready. If you don’t have a nozzle on your faucet, you can do the same process by making a dot somewhere on your faucet instead.