Which appliance connects two hoses into one and is equipped with clapper valves?

The appliance designed to connect two hoses into one while featuring clapper valves is known as a Siamese connection. This device serves a crucial role in fire suppression by allowing multiple lines to be combined for a unified water flow. The clapper valves in a Siamese connection prevent backflow into the incoming hoses, ensuring that water only flows in one direction toward the firefighting efforts.

Using a Siamese connection maximizes the water supply available for firefighting, particularly in situations where accessing larger volumes of water quickly is essential for controlling or extinguishing a fire. The design enhances efficiency and safety by allowing different hoses to deliver water simultaneously without risking a decrease in pressure or flow due to backflow, which could compromise the firefighting operation.