This Controller (BRAIN BUCKET) fills your Grow Sites approximately 10" from the bottom up each click on the timer fills the grow sites 15 minute cycles when the fill cycle is over the Drain Cycle comes on DependingonDrum size & Grow sites . The Pump in the Controller will pump 317 Gallons Per Hour and pumps out water through a 1/2" Blue Color Coded tube. The 3 outlets on the bottom are to the GROW SITES with are 3/4" connector fittings for 3/4" tubing. The 2 each 1/2" fittings on the top left side of the controller are for water in and out from the Drum. The Voltage is 110V 60HZ.