how hot should hot water be from the tap
To prevent tap water scalds, the hot water at your faucet should be no higher than 49 degrees C or 120 degrees F. Step 1: Find out how hot your water is at the faucet. Run the hot water for two minutes (wait a couple of hours before doing this test if youâve been using a lot of hot water). Fill a cup with hot water from the faucet and test the temperature with a thermometer that reads high temperatures. Wait 30 seconds and check the temperature.