Which statement best describes the function of a Siamese coupling?

Which statement best describes the function of a Siamese coupling?

• A. To join two supply hoses to feed a single attack line or deck gun.
• B. To split one hose into two.
• C. To intercept water from the hydrant and leak.
• D. To connect three hoses into a loop.

Answer: (A)

A Siamese coupling is used to merge two water supplies into one feed line. It has two inlets and one outlet, allowing two separate hoses (from hydrants or pumpers) to be connected and fed into a single attack hose or deck gun. This setup increases or combines flow to a single point for effective firefighting. It isn’t meant to split a line into two—that’s what a Wye or similar fitting does. It also isn’t about intercepting water for a leak or forming a loop with three hoses.

A Siamese coupling is used to merge two water supplies into one feed line. It has two inlets and one outlet, allowing two separate hoses (from hydrants or pumpers) to be connected and fed into a single attack hose or deck gun. This setup increases or combines flow to a single point for effective firefighting. It isn’t meant to split a line into two—that’s what a Wye or similar fitting does. It also isn’t about intercepting water for a leak or forming a loop with three hoses.