The Barbed Inline Valve allows flow of water to two areas that require separate watering conditions. Install between two lengths of supply tubing to water two separate circuits, irrigation zones, or different types of plants. Adjust, balance, or shut off water flow with a twist of the dial. Works great for watering one area with new plantings and another with established plants; or two distinct plant zones that do not require the same amount of water. Ideal for flower beds, vegetable gardens, trees, shrubs, and container plants. Barbed fittings on both sides of the valve accommodate 1/4 in. supply tubing with 0.170 in. internal diameter (ID). The 1/4 in. Barbed Inline Valve is made of ABS treated with UV inhibitors.