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Thread: Yet another RO unit thread

  1. #121
    Av8tor1's Avatar
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    Major congrats Reaper!

    cant get better then 0ppm

  2. #122
    Av8tor1's Avatar
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    BTW, here is a free filter change email reminder service... I use it, no issues with spam

    http://www.ecodynewatertreatment.com/reminder.asp

  3. #123
    Kyle's Avatar
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    Excellent, thanks again!

  4. #124
    Never Knows Best gill_za's Avatar
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    Portable Reverse Osmosis unit

    Let the necrothreading commence!

    Dear RO users,

    I am currently looking for a portable ( countertop or tabletop or whatever else it might be called) reverse osmosis unit (up to $170). My water requirements are not high and I use about 1.5 gal of water a day for my plants and a humidifier unit. It has to be a portable unit ( I am renting a condo and can't mess with the plumbing ) that I can hook to the faucet in the kitchen and unhook with ease when not in use.

    So far potential choices are:

    Mighty Mite 50GPD with DI Added

    http://www.amazon.com/AWI-Mighty-Mit...3796757&sr=8-2

    Mikro Delta Portable 3 Stage RO System (Mighty Mite)
    http://www.amazon.com/RO-MIGHTY-MITE...3796757&sr=8-1

    Portable Reverse Osmosis System Countertop 100-150 GPD
    http://www.crystalclearsupply.com/Pr...-c2&Click=4263


    One of my concerns after reading the reviews on these is that some users report a drop from 200 - 150ppm tap water to 30-20ppm only. 20 ppm is rather high.

    Does anyone have any experience with similar units here? Which would you recommend (from my list and not). I'd really appreciate suggestions and recommendations of different units (within the price range) if available.

    Thank you!

  5. #125
    Av8tor1's Avatar
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    RO units without DI remove on avg about 95-98% ish of what goes in them.... so a perfectly running unit exposed to 1000 ppm input water would have an output ppm of 20-50 ppm. The exact same unit with a 100ppm inlet would have an outlet of 2-5ppm
    Think percentages....

    (We use the DI stage to remove what the RO doesnt)

    This is if everything is "right".... if your inlet pressure is lower than 50psig at the membrane or if your water is cold then you wont get this level of performance...

    Most problems with RO units can be traced down to inlet pressure issues, be in the system or excessive pressure drop from the prefilters.

    I have no personal experience with either of these 3 units, personally Im not a fan of portable units for several reasons. But that being said, sometimes you got to do what you got to do...

    Just dont expect 4-5 year life out of the membranes with most portables, it isnt going to happen.

    (DI units mounted horizontally also tend to "channel" in short order, bypassing the mixed bed media....better if you mount them vertically to prevent this)



    HTH's a little,
    Butch
    Last edited by Av8tor1; 01-12-2012 at 11:26 AM.

  6. #126
    Never Knows Best gill_za's Avatar
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    Thank you Butch.

    It looks like I the first unit would be a better choice from the three as it comes with DI cartridge. Also from the pictures it looks like it could be mounted vertically as wel. Ill keep looking for a better one, but your post helps me narrow down my choices.

    Thank you.

  7. #127
    Av8tor1's Avatar
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    Gill,

    You should never let a membrane dry out..... it will damage it pretty bad.
    Likewise.... you should never let it go a long time without use. A bacteria will grow in them, damaging them.

    When you replace a membrane.... squeeze it, listen for crackling sounds.... smell it, does it stink?

    Both of these would indicate inadaquate use

    RO membranes need to be used on a pretty regular basis.... once use is started.

    Dont ever buy one "used"

    A properly designed system under typical conditions should get 3 to 5 years out of a membrane.

  8. #128
    mobile's Avatar
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    Gill,

    Do you know the TDS of your feed water?

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