This is a 5 yr old well built RO for a hobby producer. I bought it from a guy in VT, an engineer who was making and selling these. I got 4 good years out of it and it’s in good shape except for 2 things: 1. The pressure pump sometimes makes some loud screechy noises, and 2. I didn’t clean / rinse the membrane at the end of season last year, so I’m not sure if it’s condition but I assume needs to be replaced. In use I concentrated to 4-6% and it worked well. I paid over $2,000 for it new. I’m taking a year off and when I start back up in a new sugar bush I plan to go without RO, so I’m happy to pass this one to someone for whatever it’s worth. Happy tapping and boiling this season. Tom