There is an aspect of the fairy tale Goldilocks that applies to a good shower.
You can suffer potentially dangerous burns if the water is too cold or too hot.
The perfect balance is to find a warm enough shower that is comfortable without scalding you. Installing an anti-scald valve can help prevent a sudden jump in temperature during a shower. Showers can still be affected by forces beyond your control, regardless of how carefully you adjust the water temperature. Someone flushing the toilet or turning on the dishwasher could abruptly change the water pressure, causing it to become icy cold or fiery hot. Anti-scald valves are plumbing installations that protect you from unexpected temperature changes. Your shower handle must be disassembled in order to install an anti-scald valve. Cut the water supply line at the point where you want to install the new valve once you’ve accessed the water supply line behind the old valve. Following the manufacturer’s instructions, solder the new valve into place. Before you put the plumbing installation back together, turn the gear on the valve to set maximum water temperature. In addition to the risk of burns, there is a secondary danger associated with hot flashes in the shower – the sudden change in temperature can make the person in the shower jump or startle, resulting in a slip-and-fall accident. One more tip for reducing your risk of burns in the shower is to keep the temperature of your hot water heater set to 120 degrees. Most heaters go up to 140 degrees, but that is hotter than many people can stand and ends up being a waste of heating energy as well as a burn danger. An anti-scald valve will still come in handy even at maximum temperatures of 120 degrees, and the overall risk of catastrophe will be lower.