So why should we use a tempering valve? By law, we are required to have one installed on our hot water units to maintain the water temperature inside the house at 50 degrees. Also, a hot water tempering valve is an essential element for a successful and safe hot water system. Providing a consistent temperature to the faucet, helps users avoid severe thermal burns, prevents water waste and potential water damage, and ensures a comfortable and pleasant hot water experience. Therefore, tempering valves should be a priority in your hot water system designs to take advantage of their safety, convenience, and cost-saving benefits.