GROCO 1/2-Inch NPT Bronze 3-Way Plumbing Valve

The GROCO TWV-500 three-way valve gives a marine plumbing system a simple way to direct flow between two paths or shut the circuit off. Its handle points toward the selected flow direction, making the valve's operating state easier to understand at a glance. The center position is off, and the handle can rotate through a full 180 degrees between the two flow paths. This logical layout works well for transfer, selection, or service plumbing where an operator needs a clear manual choice.

The TWV-500 is built with a marine bronze valve body, stainless-steel handle and hardware, and PTFE seats and seals. A mounting foot is included so the valve can be secured instead of being supported only by the connected pipe or hose. GROCO lists the valve for fuel or water service, giving installers flexibility when the rest of the system is designed for the same use. The internal layout is full flow, helping the valve maintain the capacity of a correctly sized circuit.

• Handle points toward the selected flow path
• Center handle position shuts the valve off
• Mounting foot included
• Full 180-degree operating range
• UL listed for fuel or water

Mount the TWV-500 where the handle markings remain visible and the operator can reach the full sweep without hitting nearby equipment. Identify each connected line before final tightening so the left, right, and off positions correspond to the intended system function. Pressure-test the completed plumbing and operate the valve through every position to confirm both flow and shutoff before normal use. For other selector valves and marine plumbing accessories, browse Plumbing Valves & Accessories.