True or False: TPR valves function continuously in water heating appliances.

The statement is false because temperature and pressure relief (TPR) valves are not intended to function continuously in water heating appliances. Their primary role is to prevent excessive pressure and temperature from building up within a water heater. They are designed to open only under certain conditions—specifically when the pressure exceeds a pre-set limit or when the temperature rises to dangerous levels. This means they typically remain closed during normal operation.

In essence, TPR valves act as a safety mechanism, activating only in emergency situations to protect the water heater and the surrounding area from potential damage or hazards such as explosions or leaks. This function is critical to ensuring the safe operation of water heating systems.