TDS

[PSU4ME]

Assuming your Tds meter is right and 7 tds is your final output water then I have to assume your current filter can't handle the high source water or its bypassing unfiltered water some how. Your output water should be 0 and given that after 25g your DI went orange, something is not right.

Know anyone in your area who could bring over their unit and see how it performs?

 

[waltmag41]

I'm going to chalk it up to bad source water....I will check my TDS meter (I'm a chemist so I have access to small amounts of pure water at work) and I will reseat everything again today and see where I'm at. I'm resigned to the fact that I will probably need a second DI

 

[StirCrayzy]

8-900 TDS source water is incredible. Most folks on wells around here are in the 2-300 range. There are people here on RS that use whole house water softeners and plumb RODI downstream of the house filter . I assume you're doing that at least?

 

[waltmag41]

8-900 TDS source water is incredible. Most folks on wells around here are in the 2-300 range. There are people here on RS that use whole house water softeners and plumb RODI downstream of the house filter . I assume you're doing that at least?

Nope......no softener/filter of any kind. I was kind of shocked by how high it was........needless to say we drink a lot of bottled water

 

[PSU4ME]

Nope......no softener/filter of any kind. I was kind of shocked by how high it was........needless to say we drink a lot of bottled water

Ha you might want a softener!

A second DI will get you to 0 but you're still going to blow through it

 

[StirCrayzy]

Gonna blow through entire sets of RODI filters very quickly. I would invest in a whole house supply filter setup that can at least take the edge off.