OPTIONAL EXTRA FILTERS (1 = $50) (2 = $80) (3 = $110) (4 = $130) 

These bung holes are located at the back of the machine.

They bung hole holds the hot water in for the hot pot, this can be emptied for cleaning,

make sure the water cooler has been turned off, and has had time to cool down before undoing.

For best results the water cooler is best placed on the sink with the bung hole facing the sink so the hot water that comes out of here will go straight down the drain.