Providing full adjustability of each port, Rain Bird(R) drip irrigation manifold will allow you to customize flow from 0 to 20 gph for individual plants, improving root development and reducing plant stress. The manifold has 9 ports which accept standard 1/4 in. drip tubing. Each port adjusts with a side lever to increase, decrease or shut off flow. The manifold features a 1/2-in female pipe thread that mounts to a standard 1/2-in. MPT riser. Operating pressure is rated at 25 PSI.