1. Leaking out from the spout of the spigot:
This leak could be due to the debris caught in the spigot. Pull the lever up for about 10 seconds to flush out the debris/sediment.
2. Leaking around the area where the spigot is attached to the bottom tank:
In this case, reassemble the spigot. When inserting the spigot to the bottom tank, make sure that both silicon rings are dry and one is attached to either side of the tank. The spigot should be well tightened.