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I have a really high tds out of tap way over 400.Could I put my old resin that is spent (well at tds 001 before ro to cut down tds, through ro then in new resin and into tank.Or would this Knacker my ro up?
I guess that was not clear, I am having two after, then a third to use spent resin for before ro (better than throwing it away I thought) does matter how long it lasts as it would get thrown away anyway.
theres no need to have more than 2, you will not gain anything from it!just stick with 2 and when the resin is spent in the first vessel, fill that one with new resin and move the other vessel in front of it, this way you will use your resin completely
shiner thats a good idea and something that i've been meaning to get to.but as far as vessels after ro, then do you agree you only need 2?tds after ro 10, into 1st vessel out at 0, into 2nd at 0 out at 0. when the tds rises so its coming out of the 1st at 9 or 10 then it's spent (it's not doing nothing) refill this vessel with new resin and swap the 2 vessels around so your newly filled vessel is after your over vessel. continue to repeat process this way then instead of throwing resin away at 1 or 2 tds you use it right up until 10
i use 2 di vessells but find the first vessell tds stays at approx 2ppm but the second vessel with NEW Resin in sometimes goes above 2ppm before vessel 1 has gone up ? is there a technique to setting it up so it goes through vessell 1 first or is this scenario just weird