Springtech 300 RO, bought new and only used for maple syrup production at 1,000 tap operation. Typical use being 250-280 gallons/hour total throughput at 250-275 psi at to take sap to 6%-8%. Never worked hard. Always put away and stored properly in heated area as needed. Comes with some extra parts, i.e. filter or two, Y-screen, O-rings, soap and such. We are well aware that there are units this size for sale for $5000 and maybe less, but you will not find a used RO with the use and upkeep history that this unit has enjoyed, plus the Springtech's (and D&G, Airblo) units are the best built and most user-forgiving units out there. Must see to appreciate - www.mapletreefarmnh.com Reasonable offers may be considered, but not interested in endless conversations with low ball offers. keywords: RO, Springtec, Spring tec tech, sugaring, maple syrup