JBL Double Stopcock with Quick Coupling 12/16

The JBL Double Stopcock with Quick Coupling is designed for standard 12/16 mm aquarium hoses, enabling clean disconnection and precise flow control for external canister filters and water lines. By closing both integrated shut-off valves, the central coupling can be separated without water spillage or loss of siphon, making routine filter maintenance and cleaning straightforward. Made of durable aquarium-safe plastic, it features threaded union nuts on both hose barbs to secure flexible tubing tightly and prevent accidental slips.