How is a Water Heater defined in terms of pressure and temperature?

A water heater is defined in terms of pressure and temperature primarily to ensure safety and efficiency in operation. The correct choice indicates that a water heater must operate at pressures not exceeding 160 psi and temperatures that do not exceed 210°F.

This specification is particularly significant because it establishes safety boundaries for the operation of water heaters. Operating a water heater above these limits can lead to dangerous conditions, such as excessive pressure buildup which could potentially cause a rupture or catastrophic failure. Additionally, maintaining a temperature below 210°F helps prevent the risk of scalding and the creation of superheated water, which is a potentially hazardous scenario.

By conforming to these defined limits on pressure and temperature, water heaters can operate safely, providing hot water effectively while minimizing the risk of accidents and failures in residential or commercial settings.