What must be provided for a water heater installation?

For a water heater installation, both over temperature protection and overpressure protection are essential safety features that must be provided.

Over temperature protection is crucial because it prevents the water in the heater from exceeding a certain temperature, which could lead to dangerous situations, such as scalding or even an explosion. This safety feature typically includes a thermostat or an automatic shut-off mechanism that activates if the water temperature rises above the safe threshold.

Overpressure protection is equally important, as it safeguards against excessive pressure build-up within the system. This can occur due to thermal expansion of water when it is heated. Without proper overpressure protection, the water heater could fail, potentially resulting in leaks or catastrophic damage. This safety mechanism commonly involves a pressure relief valve that opens to release excess pressure.

In summary, providing both over temperature and overpressure protection is essential for ensuring the safe operation of a water heater, which is why the correct answer includes both features.