Hi im new to this Forum, and window cleaning. I have bought a round and a poe system from a guy. He was only using a DI as his water is eally clean going in. Mine is about 180 ppm, hence im told i need an RO. I will have to mount it in my van as i have no room for one else where, so can anyone please advise me on a decent one to go for, i want reasonable water production, without spending a fortune. Many thanks.