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Old 08-03-2009, 05:00 AM   #11
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TDS = Total Dissolved Solids. The meter they are talking about measures the TDS in the water, they have meters that you can install in your unit the measure the input TDS and ouput TDS, Ideally it should be at 0 on the output side of your RO/DI unit, if not it's time to change your blocks. If your unit came with a flush kit this will allow you to safely clean out your membrane. As for the rest Kurt Nelson covered it above, The higher your source TDS the quicker you will be going thru DI resin.
In short TDS is the measurement of the amount of minerals and metals contained in your water.

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