What is a bad TDS?

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Rmckoy

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My opinion is its ok for initial.fill but do not keep adding tds tap water. As long as you dont continously add to it and you top off.with 0 tds rodi water or do wcs with 0 rodi ur good to go.
D
I am guilty of the same .
needed to fill a 230 with only 90 gals plus 25 gals of new water. .
Waiting 24 hours for another 90 gals seamed like a long time

that being said .....
I think some of the issues we all have down the road is caused by the long term effect of the initial filling process
 

Brian_68

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My guess the incoming water is not zero or even single digits, the meter is reading after the RO filter and after the DI. Metal pipes, storage tank all before your house will pick up well in excess of that.
 

Spieg

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My tap water often reads TDS in single digits. Problem is it doesn't always stay that way (changes a bit from season to season), and I never really know what dissolved solids are present. Not worth the risk IMO to go without RO/DI (and with high quality source water, your RO/DI filters should last a VERY long time = almost free to operate).
 
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Ebbott

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My opinion is its ok for initial.fill but do not keep adding tds tap water. As long as you dont continously add to it and you top off.with 0 tds rodi water or do wcs with 0 rodi ur good to go.
D
considering I was making the RODI in my bathtub, and it was going to take days to get all the water I needed, I went with tap for the initial fill. Two other tanks went fine this way.

Bu, all water from now on, will be RODI.
 

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