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Thread: Old RO membrane

  1. #1
    Senior Member
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    Jan 2004
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    Old RO membrane

    Hi everyone,

    Since my old tank was dismantle (more than 6 months ago) and my new tank is not ready yet, I have not use my RO/DI unit since many months. I already plan to change the sediment, carbon and DI cartridge but since I have not used my RO since a while should I change the RO membrane too? Thank a lot for your advice guys!!

    Steve

  2. #2
    Senior Member
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    Jan 2004
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    I forgot to tell that the membrane is 2 years old !

  3. #3
    Senior Member
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    Jan 2004
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    come on please someone with experience

    I dont want to spend 120 bucks for nothing and I don't want to use it if it is not good anymore...

  4. #4
    Senior Member
    Join Date
    Mar 2005
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    233
    The only true way would be to test it out. But if I were you and had a 2 year old membrane that has been sitting for 6 months with a possibility that it went dry, it'd be a no brainer - i'd get a new one. Since you have to pick up the rest of the sediment filters, and DI resins anyways, why stop short and not pick up a new membrane? Given the big picture, the small cost is not worth the headache!
    George

  5. #5
    Moderator cres's Avatar
    Join Date
    Jul 2004
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    1,963
    You should get an inline TDS meter. Set it up just before and just after the RO membrane. If it is removing 95% of the TDS it is fine. Less than 95% and it is going or gone.

    Was it left unattached to water? Drained? Etc?
    Sarchasm: The gulf between the author of sarcastic wit and the person who doesn't get it.

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