Which type of tank is permitted to have valves installed?

The correct answer emphasizes that both above-ground tanks and inside tanks are permitted to have valves installed. This is important in ensuring that there is controlled access to the contents of the tanks, whether they are used for heating, cooling, or other applications within a mechanical system.

Valves serve several critical functions in tank systems, including controlling the flow of fluids, providing safety features in case of overpressure, and enabling maintenance without the need to drain the entire tank system. In accordance with safety regulations and mechanical codes, it's essential that these components are installed correctly to prevent leaks or other hazards.

Having valves on both types of tanks also allows for flexibility in system design and operation, making it easier to manage the fluids within these tanks efficiently and safely. Each type of tank, regardless of its location, benefits from the strategic installation of valves to promote effective fluid handling and maintenance operations. This ensures compliance with the North Carolina Mechanical Code and enhances overall system reliability.