Thanks, Arnold, that's the opposite of Buckeye's, so I'll install accordingly.
Note on these pre-filters: it's already been mentioned, but let me clarify: Remove the hose between the 1 micron cannister and the RO unit and let the water flow out. I let ~5 gal go (has black carbon residue) before attaching it back. Otherwise, your membrane will be unduly stressed. If you failed to do this, you may want to backflush your membrane for about 15 minutes. Also, my first few gallons of output that goes through brand new resin goes towards watering indoor plants.
Jim