The reverse osmosis machine is about the size of a small refrigerator.  The tall metal cylinder in back is what holds the membrane that filters out some of the excess water and keeps the sugar.  It is able to do this because sugar molecules are much larger than water molecules.

The near tank is 1000 gallons and the far tank is 600 gallons.

We installed two new tanks that will be used to feed sap to the reverse osmosis (RO) machine that we will use next year.  The RO concentrates the sap from 2% sugar to 8% sugar, reducing the amount of time needed to boil the sap before it becomes syrup.