What appliance is used to attach hoses of differing diameters?

What appliance is used to attach hoses of differing diameters?

• A. Reducer
• B. Elbow
• C. Coupler
• D. Adapter

Answer: (A)

When hoses of different diameters need to connect, you need a fitting that changes size between the ends. A reducer has two openings of different diameters, letting a larger hose attach to a smaller one (or vice versa) while keeping the flow path intact. This is exactly what’s needed in interior attack when linking hoses of differing sizes. An elbow changes direction, not size; a coupler joins hoses of the same diameter or compatible threads without changing diameter; an adapter can modify threads or sometimes size, but the device specifically used to match hose sizes in this context is the reducer.

When hoses of different diameters need to connect, you need a fitting that changes size between the ends. A reducer has two openings of different diameters, letting a larger hose attach to a smaller one (or vice versa) while keeping the flow path intact. This is exactly what’s needed in interior attack when linking hoses of differing sizes. An elbow changes direction, not size; a coupler joins hoses of the same diameter or compatible threads without changing diameter; an adapter can modify threads or sometimes size, but the device specifically used to match hose sizes in this context is the reducer.