The upper barrel section of a hydrant is often called the _______ section or head.

• A. Standoff
• B. Bonnet
• C. Cap
• D. Nozzle

Answer: (D)

Understanding hydrant anatomy helps name parts correctly. The upper portion of the hydrant’s barrel is the bonnet, which forms the housing around the valve stem and packing and is also referred to as the head in some designs. It is not the water outlet; the nozzle is the outlet that hoses connect to and is located lower on the hydrant. Caps cover those outlets, and standoff describes the distance from the hydrant to the wall. So the upper barrel section is the bonnet.