Octo-Flow Irrigation Manifold - Black - Case of 20Octo Flow was designed by irrigation professionals for simple, controlled, multi plant watering. The Octo Flow is an 8 port adjustable irrigation manifold that allows growers to dial in their irrigation setups easily at any scale. The patented design allows users to control flow rate with ease thanks to the innovative hex key plunger system, which modifies flow rates from 0 50 gallons per hour with a simple turn of the key. In addition to an