Is a shut-off valve the same as a full-open valve?

A shut-off valve and a full-open valve are not the same. A shut-off valve is specifically designed to stop the flow of water or other fluids completely when closed. It serves the critical function of being able to isolate sections of a plumbing system for maintenance or emergency purposes.

On the other hand, a full-open valve refers to a valve that is in a position allowing maximum flow through it. While a shut-off valve could be in a full-open position while it is functioning, the terms do not imply the same function. A shut-off valve can also be partially open to control flow, whereas a full-open valve indicates that it is allowing the maximum possible flow.

Therefore, stating that a shut-off valve is the same as a full-open valve is incorrect, as the purposes and functionalities of the two differ significantly.