Noob TDS question

[ml708]

If I have a high ppm reading, does that mean my ion exchange resin is not working, or the RO membrane is not working, or both?

Apologies if this is a silly question.

[kraken]

change your resins 1st, if TDS is still high, change the membranes

[ml708]

Usually it's the resin that starts to degrade first and not the membrane? Why is that so?

[brojj]

Most of the task of removing TDS is done by the resin.

[youdontnowm]

Most of the task of removing TDS is done by the resin.

nope, is ro remove most of tds first

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[brojj]

Thks for the correction.

[kraken]

resins just wear out much faster than the ro membranes, rule of thumb, change ro membrane every 6 months.

[ml708]

So on average how often should I change resin?

[Guest]

So on average how often should I change resin?

When you tds reading start to raise.

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[ml708]

It's purely a hypothetical question at the moment, getting a TDS meter tmr and will report back on the reading.