Have you ever been burnt by hot water? It is a common occurrence, and it is especially dangerous for young children and the elderly, since they don’t react as quickly and have sensitive skin. One device that is made to prevent this from happening is an anti-scald valve. Anti-scald valves mix the hot and cold water before it reaches the faucet so that it has a comfortable temperature. This is especially important considering that water temperatures could be as high as 160 degrees when coming from the water heater. That is enough to scald you in a few seconds.
Another purpose of an anti-scald valve is to prevent sudden changes in water temperature, such as when someone flushes a toilet or turns on a faucet in another area. This is what keeps you from burning in the shower when someone flushes a toilet. If your anti-scald valve isn’t working properly, you will notice it quickly that way.