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Bronze Vented Loop, 1" ID Hose by Groco | Plumbing & Ventilation at West Marine. Install a Bronze Vented Loop to ensure fluids will not siphon from tank to tank. Groco's Bronze Vented Loops feature an oversized vent valve for clog-free anti-siphon protection for sanitation or engine exhaust systems. The cap is easily removed for inspection or cleaning without tools and is threaded 1/2" NPT to accept a barb fitting for overboard venting (required if these vented loops are used in an exhaust system). Bronze vented loops have an outer surface that is rough in feel and appearance, almost like its covered with sand. Thats because bronze vented loops are sand cast, and then machined. Bronze is known for excellent resistance to harmful corrosion. Mounting hardware included. These Bronze Vented Loops feature hose barbs on both ends (size given as inside diameter or ID).
