DIY RO top up tank

Discussion in 'Anything DIY Related' started by butcherman, 20 Apr 2010.

  1. butcherman

    butcherman Moderator MASA Contributor

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    Planning to build a RO topup tank next to sump. the space is limited so the dimentions will be 85cm x 10cm x 30cm giving aout 25lt of RO water to topup with which should last about 10 days in my system. im thinking about making it from 5mm glass and it gives a safety factor of 4 using the online calculator.

    concerns i have is should the glass from the sump touch the glass from the RO tank it might cause the glass to crack, any ideas? maybe i should build the RO tank as an extention of the sump making the use of one common pane of glass.

    any ideas or comments?
     
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  3. Mekaeel

    Mekaeel Moderator MASA Contributor

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    Hi Butcherman. I rekon make the sump and RO reservoir together. ie. using the same common pane. My sump is also done in this fashion. :)
     
  4. PeterL

    PeterL

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    Are you kidding me, I have been racking my brain for a way to do an RO filler - gees, this is crazy easy and it has been available and in my face this whole time...
     
  5. mandarinman

    mandarinman

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    , dang mekaeel you are this sites fairy godmother! dishing out wisdom like this!
     
  6. PeterL

    PeterL

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    Are there other methods or DIY systems for a level switch?
    I wouldn't think so off hand but maybe someone has come up with something and could share it with us.
     
  7. Riddi

    Riddi

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    well if you have enough space above your sump you could always build a gravity fed auto top up, very easy and no mechanical failures.:thumbup:

    I have also read some where on the forum about using a over the counter float switch operating a inexpensive pump as a DIY auto top up
     
  8. mariusmeyer

    mariusmeyer

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    In order for a gravity fed top up to work, you need to make sure that the reservoirs is airtight. Cause if it even has the slightest of air leak then the whole reservoirs will empty into the sump and screw up your salinity.
     
  9. robertkukla

    robertkukla

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    following this post
     
  10. Boegie

    Boegie

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    One thing that I also need to still make.
     
  11. robertkukla

    robertkukla

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    show us how to do this
     
  12. neo

    neo

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    make the reserviour seperate and use silicone 'spots' on outside to keep the glass from touching, like the 'bang stop' they use on kitchen cabinet doors.

    have a look at
    http://www.marineaquariumsa.com/showthread.php?t=14347
    where i showed my idea of diy mounting the float switch.

    changes since then include:
    making a u-shape from 2 90degree elbows and using an end-cap to mount the float switch upside down.

    i use a 12v transformer feeding the float switch and triggering a relay wich switches the pump on-off.

    for safety you can use a second float in same manner in series to first.

    i.m.o. its better to use a commercial top-up unit as some has a 'time check', it must sense the float trigger for longer than 5 seconds before switching on the pump and i think this is better for the pump and relay.
     
  13. Neil H

    Neil H Moderator MASA Contributor

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    there are two basic ways that i have seen working

    1 is the auto top up which works on an electronic float switch and a small pump, one can DIY this for about R120 or buy from the sponsors for about R550 i think, the advantage is that you do not need to have a height difference for this to work, i.e. can be part of the sump or a seperate Ro chamber on the same level

    2 Gravity fed system. Now i have heard of the ones where it is a sealed unit sitting above the sump with a pipe leading to the sump at the required level (much like the 2ltr coke bottle auto top up for dogs water, and i even tried building one but it is more hassle than it is worth and IMHO doesnt work well. the gravity fed system i would reccommend as the best over all solution is where there is a ro chamber above the sump with a bottom draining pipe attached to a mechanical float valve (like a toilet float valve) controlling the water level
     
  14. robertkukla

    robertkukla

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    thanks this is a very easy DIY project
     
  15. robertkukla

    robertkukla

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    thanks butcherman for the threa
     
  16. butcherman

    butcherman Thread Starter Moderator MASA Contributor

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    thanks mekaeel you got a pic of how you did it?

    unfortunatly space is the limiting factor. no space above sump.... only above tank :razz:
     
  17. butcherman

    butcherman Thread Starter Moderator MASA Contributor

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    Right got the Glass, silicone, and top-up kit here is the results

    glass cut and ready for assembly.
    [​IMG]

    assembly....
    [​IMG]

    now to wait for silicone to cure
    [​IMG]

    leak detection
    [​IMG]

    tank inplace
    [​IMG]

    water level sensor
    [​IMG]

    inlet valve
    [​IMG]

    capacity is about 27l
     
  18. brentnorm

    brentnorm

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    Nice diy
     
  19. Singularity

    Singularity Hmmm amper!

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    very nicely done
     
  20. Riddi

    Riddi

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    looks good there
     
  21. jacquesb

    jacquesb Retired Moderator

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