Tds after filters and membrane but before di-resin

Discussion in 'Water Fed Pole Cleaning' started by UncleAlbert, May 29, 2014.

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  1. UncleAlbert

    UncleAlbert Member
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    So, BIG Question what TDS range am I looking for before my filtered water goes through my 10" Di chamber??
    So, Big Question 2 - would I destroy my resin if i ran my RO unit without the membrane for any length of time??
     
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  2. keir

    keir Guru
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    Answer to big question No 1.......as low as possible, whats your tap tds
    Answer to big question No 2 ...... No, the filter is the RO, so no filter no damage. The water would've just been running through the housing only
     
  3. Smurf

    Smurf Banned
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    #3 Smurf, May 29, 2014
    Last edited: May 29, 2014
    Normally between 2-10 ppm
    Yes you will as the 10 inch di canister holds very little resin so you will kill it very quickly running tap water through it without using the ro membrane fitted

    Why on earth would you want to take out a ro membrane from it's housing beats me:confused:
     
  4. UncleAlbert

    UncleAlbert Member
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    Assumed the RO filter had been factory fitted, on examination membrane not fitted or even supplied, so ran the RO system through the DI without a membrane fitted for the first 50 litres of not so pure water!
    membrane obtained but system will now only produce a minimum of 17 TDS
     
  5. Smurf

    Smurf Banned
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    So how long did you flush the ro for after the membrane was fitted without the di canister connected?
     
  6. UncleAlbert

    UncleAlbert Member
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    for 5 gallons of alledgedly pure watero_O
     
  7. Smurf

    Smurf Banned
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    You lost me there as the purpose of the first flush of a new ro clears any manufacturing chems left in the new RO membrane & new filters. I have no idea how long you should flush a new 75 gpm RO but I know if your getting 17 ppm from it now you did not flush it for long enough as should be alot lower than 17 ppm surely?
     
  8. UncleAlbert

    UncleAlbert Member
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    Followed the system instructions, only mistake was that no membrane fitted or supplied, so water ran through filters - no ro membrane then straight through Di vessel :eek:
     
  9. doug atkinson

    doug atkinson Well-Known Member
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    If it's a 10 inch resin cartridge then that's your resin finished
     
  10. UncleAlbert

    UncleAlbert Member
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    #10 UncleAlbert, May 30, 2014
    Last edited: Jun 1, 2014
    tap water TDS is about 340
     
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