Results 1 to 4 of 4

Thread: Reverse Osmosis filter - water parameters (conductivity)

  1. #1
    New Member
    Join Date
    Jan 2015
    Country
    Poland
    Posts
    2
    Thanks
    1
    Thanked 0 Times in 0 Posts

    Default Reverse Osmosis filter - water parameters (conductivity)

    Hi,
    Recently I have bought a EC meter and I've done some measurment of my RO water (RO5 filter). I was suprised that water have ~300 us. I have checked the filter and it was wrongly installed (it was moved from one place to another few years back). After properly assembling the vaules even got worse (up to 600 us). I have changed the membrane (as i thought it could be damaged). It helped a bit but still got values at 400 us which are way to high as it should be max 10us


    Could anyone check what values of ppm/us you have after the prefilters (before membrane).
    My prefilters are: 1. Polypropylene 5 micron 2. Activated Carbon Block 3. Polypropylene 1 micron
    Membrane: 50 GPD

    My tap water have ~700us

    thanks

  2. #2
    Member masele's Avatar
    Join Date
    May 2014
    Country
    Spain
    Posts
    43
    Thanks
    0
    Thanked 9 Times in 8 Posts

    Default

    Could be a problem of the flow restrictor and correct pressure it's not achieved in the membrane chamber, replacing it may be a good idea.
    My tap water has about 750ppm but my RO system got a TDS value from about 8ppm, i have to say that i use a directflow system with 400gpd membrane, but back in time i also used 50gpd membranes and the value was 30ppm.
    I have observed that the use of a water softener filter helps a lot the membranes to do his job and make his useful life longer, the resin inside changes calcium and magnesium ions for sodium ions and this seems to be easier to remove and less harmful for the membrane.. i never changed mine and has 3 years of service producing same water values.

  3. The Following User Says Thank You to masele For This Useful Post:

    Gawel (1st Feb 2015)

  4. #3
    New Member
    Join Date
    Jan 2015
    Country
    Poland
    Posts
    2
    Thanks
    1
    Thanked 0 Times in 0 Posts

    Default

    Quote Originally Posted by masele View Post
    Could be a problem of the flow restrictor and correct pressure it's not achieved in the membrane chamber.
    You are right . How could i missed that before?! The whole construction is quite easy and i wouldn't lost my nerve i would probably find that out (i think )

    Thanks a lot.

    Cheers

  5. #4
    Member "tastes like shrimp"'s Avatar
    Join Date
    Dec 2012
    Country
    United_States
    Location
    Milky Way Galaxy
    Posts
    21
    Thanks
    0
    Thanked 1 Time in 1 Post

    Default

    My 150GPD 7-stage RO unit... around 50us after prefilters, <5us after all filters

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Reverse Osmosis - WITH ALKALISER
    By matblack in forum Water Conditioning and Management
    Replies: 3
    Last Post: 17th Oct 2011, 09:44 PM
  2. Water Parameters
    By cutedragon in forum Water Conditioning and Management
    Replies: 2
    Last Post: 31st May 2011, 02:17 PM
  3. Reverse Undergravel Filter
    By imke_j in forum Equipment & D.I.Y.
    Replies: 9
    Last Post: 3rd May 2011, 05:11 PM
  4. Water Parameters Please...
    By cllui in forum Species
    Replies: 1
    Last Post: 14th Jan 2011, 12:06 AM
  5. reverse osmosis
    By amanda in forum Equipment & D.I.Y.
    Replies: 9
    Last Post: 12th Dec 2010, 08:52 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •