Where is the Higbee Indicator located on 2½ inch couplings?

• A. On the inside surface of the hose
• B. On the nozzle
• C. On the end cap
• D. Found on lugs of both female and male couplings

Answer: (D)

On 2½ inch hose couplings, the Higbee Indicator is located on the lugs of both halves—the male and the female. These indicators are visible when you bring the two couplings together and line up the marks to show that the threads are aligned for proper engagement, helping to prevent cross-threading and damage. It isn’t placed on the inside surface of the hose, on the nozzle, or on the end cap, because its purpose is to guide the alignment of the coupling halves where they interlock. When the indicators on both halves align, you can safely start threading the couplings together.