Right now my RO consists of a gravity fed 140 procon and residential 400s. I got a ss 240 gph procon and a steal on a brand new 3/4 hp motor thru ebay. Planning to plumb that through a 4x40. I could gravity feed it as well, but thought I'd get better flow with a feed pump. Wondering what ideas or thoughts are out there. Thxs, Mark
