Gardena Master Unit 2000 is the starter component of theMicro-Drip-System Reduces initial pressure to an operating pressure of approx.1.5 bar for optimal operation of the connected Drip Heads and Spray Nozzles Water flow is approx. 2,000 liters per hour With large-volume filter, the water is optimally filtered Equipped ready-to-connect Patented "Quick & Easy" connection technology, installation of the Master Unit is especially easy