Siamese appliance: what does it do?

• A. Splits one line into two
• B. Controls valve
• C. Used to measure water pressure
• D. Takes two or more hoselines and forms them into one hoseline

Answer: (D)

A Siamese appliance is the fitting that merges two or more hose streams into a single hose line. This lets you combine the water from several hoses to feed one large-diameter line or reach a specific nozzle, increasing the available flow at the point of discharge. It’s not meant to split lines (that would be a dividing or splitting fitting), nor is it a valve or a pressure gauge—the valve controls flow and the gauge measures pressure, respectively. The Siamese is used to create one combined outlet from multiple incoming lines, which is exactly what you need when a single large output is required.