metal plumbing to an RODI unit

i don't know what the tds of the tap is, i've got the 90gpd with the inline dual tds (i just looked and youre right, it reads after the ro so i guess it must be working) i have not calculated my my waste ratio yet but i was going to play a little after work. for flushing the system, i ran it for about 30 minutes and called it good.

as for pressure i'm sitting around 47-48 and temp, i'm just running it straight off my cold waterline so i'd guess maybe 60?

 

alright, everything is set. i'm running a perfect 4-1 ratio, no adjustment needed (woot). great little set up, anyone looking for an RO DI unit should definitely look into this

 

Good news.