DIY Gravity Fed Auto Top Off System

Discussion in 'Anything DIY Related' started by Jason, 3 Jun 2014.

  1. Jason

    Jason

    Joined:
    13 Feb 2008
    Posts:
    1,381
    Likes Received:
    51
    Location:
    Cape Town
    So i want to do a gravity fed auto top off system, thinking of using a 5l bottle and placed it into a cupboard above my tank.

    I have searched the net and found what i want to do but no real clarity yet.

    I will be using 2 pipes, one a breather pipe and the one will feed RO water. The breather pipe will go up in the bottle just above water level and into the tank a few mm below water level. The second pipe will be going at the bottom of the 5l bottle and deeper into the tank, this will feed the RO water and as it fill up to normal level the water will seal off the breather pipe. Both pipes well have shut off valves for when filling the bottle with RO water

    Is this the correct way? i dont want to use a float switch or valve as there is no space at the back of my tank and dont want it in my DT

    Please give advice to where i might be doing something wrong

    Thanks

    [​IMG][/URL][/IMG]
     
  2. AdS Guest




    to hide all adverts.
  3. RiaanP

    RiaanP Moderator

    Joined:
    11 Aug 2008
    Posts:
    23,142
    Likes Received:
    1,228
    Location:
    Centurion
    as long as you are not using a plastic bottle that can collapse.
     
  4. Jason

    Jason Thread Starter

    Joined:
    13 Feb 2008
    Posts:
    1,381
    Likes Received:
    51
    Location:
    Cape Town
    Ok so i should use something stronger then a jerri can? I wanted to use these 5l jerri can bottles but i know they are little on the pap side...
     
  5. RiaanP

    RiaanP Moderator

    Joined:
    11 Aug 2008
    Posts:
    23,142
    Likes Received:
    1,228
    Location:
    Centurion
    Glass bottle. Nothing else that can suck in.
     
  6. Jason

    Jason Thread Starter

    Joined:
    13 Feb 2008
    Posts:
    1,381
    Likes Received:
    51
    Location:
    Cape Town
    Ok, but the problem with a glass bottle is i then need to drill holes into the bottom, can that be done
     
  7. RiaanP

    RiaanP Moderator

    Joined:
    11 Aug 2008
    Posts:
    23,142
    Likes Received:
    1,228
    Location:
    Centurion
    or into the lid, and use it upside down
     
  8. Jason

    Jason Thread Starter

    Joined:
    13 Feb 2008
    Posts:
    1,381
    Likes Received:
    51
    Location:
    Cape Town
    Yes for sure, will try it out...

    Thanks
     
  9. RiaanP

    RiaanP Moderator

    Joined:
    11 Aug 2008
    Posts:
    23,142
    Likes Received:
    1,228
    Location:
    Centurion
    just test it outside, using any bucket
    Siphon some water out without creating waves. And see if it top up correctly. Do not install it on your tank without testing it outside on a bucket.
     
  10. Jason

    Jason Thread Starter

    Joined:
    13 Feb 2008
    Posts:
    1,381
    Likes Received:
    51
    Location:
    Cape Town
    Thanks Riaan, will do just that...
     
  11. kalkwasser

    kalkwasser

    Joined:
    16 Jul 2008
    Posts:
    863
    Likes Received:
    13
    Location:
    Durban, Bluff
    I am going to give that a shot on my 4 foot!
    Been thinking of a way without using the float switch.
     
    Last edited: 3 Jun 2014
  12. Jason

    Jason Thread Starter

    Joined:
    13 Feb 2008
    Posts:
    1,381
    Likes Received:
    51
    Location:
    Cape Town
    The float switch i found alot of, just like how our toilets work but i dont have the space in my nano in the back chambers with my lid on, so ill have to drill holes or groves to fit the pipes
     
    Last edited: 3 Jun 2014
  13. Istio

    Istio

    Joined:
    5 Mar 2011
    Posts:
    145
    Likes Received:
    11
    Location:
    Adelaide, SA
    I've often wondered though, would salt water not diffuse into the FW container? Or would the diffusion be so slow as to be insignificant?
     
  14. Chris Delport

    Chris Delport

    Joined:
    13 Jan 2009
    Posts:
    190
    Likes Received:
    2
    Location:
    Kempton Park
    I am in the research and destroy stage of my diy top up and for now it works fine.

    Sourced an all plastic toilet valve and machined a perspex bracket to fit the sump side,then I used irrigation elbows for plumbing for now and the container above the sump next to the DT.

    When the water level drops the ball lowers and opens the valve,no need for electricity.:tt2:

    If anyone has experience with this kind of project please guide me.

    [​IMG]
     
  15. kalkwasser

    kalkwasser

    Joined:
    16 Jul 2008
    Posts:
    863
    Likes Received:
    13
    Location:
    Durban, Bluff
    Cool system, but don't think its going to help Jason out as it takes up about the same amount of space as the float switch.
     
  16. VicZA

    VicZA

    Joined:
    7 Jul 2013
    Posts:
    1,007
    Likes Received:
    9
    Location:
    Nelspruit
    I want to do the exact same thing on my tank, with a slight variation. Can you show me what float valve you used (a clearer pic) so I can get an idea of what to look for ?
     
  17. Chris Delport

    Chris Delport

    Joined:
    13 Jan 2009
    Posts:
    190
    Likes Received:
    2
    Location:
    Kempton Park
    No problem @VicZA, I'll take a photo tonight. I bought it from Mica for about R70-00.It looks like an aluminium shaft that I covered with heatshrink and sealed the ends where it enters the valve and the ball.
     
    Last edited by a moderator: 26 Nov 2015
  18. RiaanP

    RiaanP Moderator

    Joined:
    11 Aug 2008
    Posts:
    23,142
    Likes Received:
    1,228
    Location:
    Centurion
    The diffusion up the pipe is slower than the evaporation rate. Meaning as salt enters the pipe, it will flush out.
     
  19. Chris Delport

    Chris Delport

    Joined:
    13 Jan 2009
    Posts:
    190
    Likes Received:
    2
    Location:
    Kempton Park
    @VicZA here is what I have for you.

    [​IMG]

    [​IMG]
     
    Last edited by a moderator: 26 Nov 2015
  20. Jason

    Jason Thread Starter

    Joined:
    13 Feb 2008
    Posts:
    1,381
    Likes Received:
    51
    Location:
    Cape Town
    Very nice setup... Pity i cant do the same
     
  21. VicZA

    VicZA

    Joined:
    7 Jul 2013
    Posts:
    1,007
    Likes Received:
    9
    Location:
    Nelspruit
    @Chris Delport thanks very much ... will go look for one at Mica or somewhere similar
     
    Last edited by a moderator: 26 Nov 2015
Recent Posts

Loading...
Similar Threads - Gravity Auto System Forum Date
Gravity feed skimming Protein Skimmers, Mechanical Filtration 28 Jun 2015
Gravity feed flow-rate Pumps and Waterflow 22 Jun 2013
good little vid on salinity & specific gravity Water Parameters and Additives 21 Nov 2011
My gravity-fed algae scrubber Biological/Natural Filtration and Deep Sand Beds 24 Nov 2010
Nano (450 DT) gravity fed Algae Turf Scrubber Chemical Filtration / Low Nutrient Systems - LNS 29 Sep 2009
specific gravity Water Parameters and Additives 19 May 2009
Hard Gravity Water Parameters and Additives 18 Jan 2008