Which Air Force (AF) form is used to maintain a record of each hydrant and its isolation valve?

The Air Force Form 1027 is specifically utilized for maintaining records related to hydrants and their corresponding isolation valves. This form serves as a detailed inventory and maintenance log, ensuring that all pertinent information about each hydrant and its associated isolation valve is documented accurately. This is critical for effective water and fuel systems management, as it helps in tracking maintenance activities, locating specific hydrants when needed, and ensuring system reliability and safety.

The other forms listed have different purposes: AF Form 996 is generally used for records of inventory or equipment, AF Form 997 pertains to inspection reports, and AF Form 998 is focused on tracking vehicle maintenance. Recognizing the specific function of each form is essential for proper documentation and record-keeping within Air Force operations.