RO unit flushing

Discussion in 'Test Kits, Controllers, Reactors and Dosers' started by deadmeat2016, 19 Mar 2013.

  1. deadmeat2016

    deadmeat2016 Wouter

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    Right, in light of me being inexperienced at RO units, I have some questions;

    1) When replacing the cartridges, one is required to flush the carbons before fitting the membrane, correct? how exactly does one do this? Do you install the carbon, remove RO membrane, close the unit and let the unit run for about 30 liters?

    2) Flushing the membrane, you do this after flushing the carbon correct? do you just open up the unit again after flushing the carbon, install RO mem, then let it run for 30 liters?

    3) the DI resin, you install this after all flushing is done i presume?

    4) Marco said that 2 carbon blocks work better than a carbon block and GAC(granular activated carbon), so I install 2 carbon blocks right?

    Thanks dudes
     
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  3. Nemos Janitor

    Nemos Janitor

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    Not sure why no response from any reefer....... And I suppose you have done what you thought anyway.:)
    1) I remove the pipe from the carbon block to the RO membrain's and run till clear then 5 min longer. All new cartridges are installed.

    2) once the sediment and carbon filters are producing clear water the pipe is reconnected to the RO membrane.

    3) the RO membrane is then flushed to remove any membrane preseritives. The prefilters are connected to protect the RO membrane to protect the RO membrane. Do not flush the membrane with un prefiltered water.

    4) connect the DI pod after the flushing of the RO membrane

    Flushing can be confused. There is the "flushing of the system" and flushing of the RO membrane. The flushing I am referring to is the cleaning of the RO membrane from preservatives.

    Other flushing refers to the cleaning of sedatives on collected on the membrane.



    I do not see a benefit of installing two carbon block filters as carbon only removes chlorides, sediments and VOC's. we can argue this if you want.

    I prefer to have sediment filters as they remove the sediment and a lot of the cA in the water.
     
    Last edited: 19 Mar 2013
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  4. deadmeat2016

    deadmeat2016 Thread Starter Wouter

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    Thanks NJ, that cleared up some things but the flushing of the membrane of preservatives, is that done by just running water through the whole system are prefilter flushing or are you referring to playing around with the waste output of the membrane?
    I also would prefer 2 sed filters because our water has so much sediments in, the sed filter goes brown within a month, but my RO unit only has 3 of those white screw in thingys which cartridges are put in, could you add another screw in thingy or would you change one of the carbon cartridges? if so which type of carbon would you keep?
     
  5. Nemos Janitor

    Nemos Janitor

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    The RO membranes should come in a vacume sealed packaging. This it to prevent any moulds contaminating. The membraine also has a preseritive. The reason to run the RO unit and discard the first few hundred litres of RO water. So yes just run the RO unit and discard the first 200 l

    I would suggest running...2 sediment filters, --to-- 1 carbon block filter --to -- RO membrane --to --DI pod.

    Do not know where GAC is coming into the equation except that the carbon block is in effect GAC. Carbon block carteriges are a carbon dust that is compact into the cartridge. They are more efficient than GAC as the particulate provides a better surface area.

    I suppose the next Q is going to be, PO4 from the carbon block cartridge? Answer I do not know.
     
    Last edited: 19 Mar 2013
  6. deadmeat2016

    deadmeat2016 Thread Starter Wouter

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    ahhh, thats the answer i was looking for, so the carbon 'block' takes priority over the granular carbon, gonna 'recharge' my RO unit next week and do the whole flushing thing, thanks NJ:)
     
  7. Nemos Janitor

    Nemos Janitor

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    In my tank threads I show a RO unit that I bought from Marco about 3 or 4 years ago. It has 2 large sediment filters, 1 carbon block and then go on to the RO membrane matrix ending at the DI cartridge.
     
  8. Nemos Janitor

    Nemos Janitor

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    Yes it is no secret about the difference between carbon block and GAC. Lots of info out there. :whistling:
     
  9. deadmeat2016

    deadmeat2016 Thread Starter Wouter

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    Whoopsie, the things that come up when one asks questions.......my conclusion, RO is stupid lol :thumbup:
     
  10. Nemos Janitor

    Nemos Janitor

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    Bud my bad. Sometimes I read and put things that come across indifferent. All I am doing is backing up my statements. Sorry if I offended.
     
    Last edited: 19 Mar 2013
  11. deadmeat2016

    deadmeat2016 Thread Starter Wouter

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    nah no offence taken dude, I just don't like RO anymore lol wish I had water specialist set up my unit. I guess i'm a bit wiser though :1:
     
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