So I went with the BRS 7 stage, pretty shure I couldn't go wrong. We have high water pressure here because I live in the hills. I'm going to see about turning my pressure regulator down at the house, if I can find it, but do you guys put pressure regulators on the RODI or is that not common? I'm getting about 85 psi right where I want to put it, but didn't want to damage it.