Got the buckeye hydro RO system installed - first did the system flush on the pre-filters for 10 minutes, put in the RO membrane, followed by 3 gallons of permeate (clean RO water) which I dumped before use on beer day. Installed a dual TDS meters on the incoming and outgoing water lines.
Incoming (tap water) - 55 ppm
Clean Permeate - 3-4 ppm
Very smooth install, quite easy actually in my case since I am just running waste to the ground outside and input water is via a brass female hose fitting.
Excited to check it out on a brew day - coming shortly. I think I am going to make another Irish Red next.