What is the term for the top of a hydrant?

The term for the top of a hydrant is "bonnet." The bonnet serves as the uppermost part of the hydrant, and it is designed to facilitate access to the internal components of the hydrant for maintenance and operation. It typically houses the operating mechanism, including the valve and opening mechanism that allows water to flow when the hydrant is in use.

Understanding the components of a fire hydrant, including the bonnet, is crucial for firefighters when they are responding to emergencies. It helps them quickly identify how to operate the hydrant and manage their water supply efficiently. Knowing the correct terminology also assists in communication among fire service personnel during training or operations.