What is the difference between tempered and hot water?

Tempered water refers to water that has been mixed or regulated to reach a specific safe temperature, usually to prevent burns or scalds. The typical range for tempered water is around 100°F to 110°F (37.8°C to 43.3°C), making it suitable for various applications, particularly in settings like showers and sinks where user safety is a concern.

Hot water, on the other hand, is water that is heated to much higher temperatures, often exceeding 120°F (48.9°C) and potentially reaching scalding temperatures of 140°F (60°C) or more. Such high temperatures can be dangerous, particularly for vulnerable individuals like children and the elderly, who are at greater risk of burns.

This distinction is vital in plumbing systems, particularly in regards to user safety standards and regulations regarding water temperature in domestic and commercial settings. Understanding this difference helps ensure that plumbing systems are designed effectively and safely.