Which statement correctly identifies 5-inch coupling type options?

• A. Aluminum with locking levers, steel base
• B. Brass with locking levers
• C. Brass with thumbscrew
• D. Sexless (Storz) made of aluminum with locking levers

Answer: (D)

5-inch hose couplings are typically quick-connect, sexless designs known as Storz. These fittings connect without matching male and female ends and lock together through interlocking lugs, often secured with a lever or cam mechanism for a fast, reliable seal. Aluminum construction is common for these fittings because it keeps the coupling light while still durable, and locking levers make the connection quick and secure in the field. The option that describes a sexless (Storz) coupling made of aluminum with locking levers matches these practical characteristics, making it the best choice. Other options mix features that aren’t standard together for 5-inch Storz couplings, such as thumbscrews or a steel base, or use materials less typical than aluminum for this style.