But the input for mine is somewhere around twice the size of my output tubing, or does it go in the waste water tube and the RO water tube? I guess those are the same size. And would you ever really get a TDS of 000? Anyone else confirm that? I guess with a de ionizer you will get more, but my friend hooked me up with a bottle of this really good water. V*O*S*S Water from Norway, glacier water then RO. that a TDS of 22. I know water for drinking shouldnt be 100% pure, but how accurate is the meter if your getting 000 tds? Anyone else get that?