Tank capacity is 0.5 Gallons (2.1 Liters). When the water reaches the top of the water level window on the front of the tank it is full, do not overfill the tank above the top of the window.

The tank can be filled in either of two ways, pour water directly into the top fill area, or remove the top enclosure to fill the tank directly. When using the top our method, pour slowly as the top-fill opening is designed for a steady, gentle pour, not a fast dump.