Measuring PPM in RO

Will a high quality PPM meter measure RO accurately if PPM is > 100?

Should. I think I’ve seen as low as 50ppm on my cheap one.

I just installed an new RO (I couldn’t get filters for the old one) and PPM is high, so I wondered. I’m getting a high reading so I guess I just need to flush the system a coupe more times.

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My cheapy reads fine. Started at 0 ppm but up to 5ppm now that the filters are getting older.

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Yes flush, and back flush but should be less than 50ppm.

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Two flushes brought me back down to ~50 PPM, Happy, happy.

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What system did you get, looking into purchasing one

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[Watts Premier P531417 531417 RO Pure Plus.

I bought an obsolete Watts previously, but it has been discontinued and filters are unavailable.

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