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Flood and Drain. HOME GROWN FLOOD AND DRAIN; (Diagram-3)           A flood and drain system requires a timer, a pump and a drain tank to catch the hydro juice. Hose is run from the bottom of the drain tank to the pump inlet. Hose is run from pump outlet to the hole in the top of the flood (high) end of the root chamber. The pump inlet is below the bottom the drain tank. As the drain tank is filling hydro juice flows through to the pump inlet through the pump and up the flood hose till level with the hydro juice in the tank. This is to prime the pump as the pump can't suck air, it can only push out what flows in the inlet. The timer runs the pump for 1 minute and the hydro juice fills about half the root chamber. If chamber over flows increase size of drain holes. If a hose is used at the drain end, it must not cause hydro juice to stand at the drain end. A recycling type bin is ideal for the drain tank (see end of Drip Feed section to attach hose to drain tank). Putting the pump on the floor and the drain tank on bricks should raise it enough prime the pump.

 

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