[easy clean]

i have a 300 gpd ro from ro-man, then it runs through 2 x 11 litrte di vessels and into tank.

tds readings out or ro  12. after first di 2. after second di 2. if i only run it through one di still 2. shake them around swap places and still 2.

tds meter is calibrated using solution.

very strange any ideas

[NWH]

Check that the DI vessels have the arrows pointing the right way ie water in water out,2-1 on that`s the trouble.

[windowwashers]

How old is the resin you are using,  where is it stored this could be the problem.

[ftp]

Try someone elses meter?

[alanwilson]

any chance that both resins are a little old?  I've had this before, sometimes resin won't di down to 000ppm very well but will settle around 1 or 2ppm.

[NWH]

If you change the resin it will give you the answer.

[windowwashers]

any chance that both resins are a little old?  I've had this before, sometimes resin won't di down to 000ppm very well but will settle around 1 or 2ppm.

I agree with that as I am using some resin I bought with another set up and it will not go to 000 it is 001 and has been for weeks  : I did change it over and still the same.

[[GQC] Tim]

Fill it 3/4th, and shake the vessel while filling, give it a couple of good bashes on the ground so it's nicely packed.