H2O Innovation 300 Concentrator RO. Unit is in excellent shape and has fewer than 15,000 gallons through it. Membranes not passing any sugar at all. Although the machine will take sap to 8% in a single pass at less than max pressure, we most often ran it at 50/50 flow (permeate/concentrate). RO looks like the one in the picture but with three membranes instead of two. Selling due to upgrade. I can accept a credit card payment Looks like my helper put the left side caps on upside-down after cleaning... Smile I'm pretty sure those drains are supposed to go down!