What is the correct way to install a T and P valve on a water heater?

The correct way to install a temperature and pressure relief (T and P) valve on a water heater is at the top or side of the tank, with the discharge directed to an approved location. This is essential for the safe operation of the water heater, as the T and P valve is designed to prevent excessive pressure and temperature buildup in the tank, which could lead to an explosion.

Placing the valve at the top or side allows for effective operation since it can sense both temperature and pressure accurately. Additionally, the discharge pipe from the valve must be routed to a safe location, typically to the floor or to a drain, to ensure that any scalding hot water that might be released does not pose a risk to individuals nearby. This also helps to comply with plumbing codes that dictate proper installation practices for safety.

While valves positioned at the bottom or rear of the tank may seem convenient, they do not provide the necessary effectiveness or safety measures and could lead to dangerous conditions if a malfunction occurs. The placement guidelines are strict to help ensure that the system functions as intended and that there are no hazards present in the home environment.