Overflow issues

Discussion in 'Anything DIY Related' started by Tim S, 3 Feb 2010.

  1. Tim S

    Tim S

    Joined:
    11 Jul 2009
    Posts:
    430
    Likes Received:
    1
    Location:
    Cape Town
    Hi all, I built a perspex 'pre-filter' box below my dt overflows. The 2 overflows are 50mm dia and deliver about 1500 litres per hour each. The idea is that the overflow water passes through layers (about 8) of filterwool sheeting as a pre-filer before the dsb. To evenly distribute the flow accross the area of the filter sheeting, I placed a sheet of perspex which I drilled a grid of holes through to disperse the water and drop through all the holes onto the filter material. All works brilliantly except for two problems. There is quite a bit of splashing taking place which causes a noise with a fine water spray around the unit leaving things covered in salt. Has anyone got something similar which works better or advice on a more silent and controlled flow or filter system?

    Tim
     
  2. AdS Guest




    to hide all adverts.
  3. viper357

    viper357 Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    27,980
    Likes Received:
    776
    Sounds quite complicated. Post some photo's of it and let's see if we can offer any advice.
     
  4. Tim S

    Tim S Thread Starter

    Joined:
    11 Jul 2009
    Posts:
    430
    Likes Received:
    1
    Location:
    Cape Town
    Hi Viper, ok i'll take some pic's tonight and post.
     
  5. Tim S

    Tim S Thread Starter

    Joined:
    11 Jul 2009
    Posts:
    430
    Likes Received:
    1
    Location:
    Cape Town
    Ok, here's the pic's. I normally have a piece of tin foil over the top to stop the splashing but this is not ideal. I have tried to vary the position of the perspex sheet with holes in from right up against the overflows till right ontop of the filterwool with no marked diffirence in the splashing. I'm thinking that a possible way so solve it is to change the way in which the water comes out the elbow. Maybe a stopper with drilled holes instead of one great big hole?

    Any offerings?[​IMG][​IMG][​IMG]
    [​IMG]
     
  6. keyaam

    keyaam

    Joined:
    28 Jul 2008
    Posts:
    2,502
    Likes Received:
    16
    Location:
    Cape Town
    change the elbows to T's and extend the pipe to below the water level
     
  7. Tim S

    Tim S Thread Starter

    Joined:
    11 Jul 2009
    Posts:
    430
    Likes Received:
    1
    Location:
    Cape Town
    If I extend the pipes downwards then I cannot remove the perspex sheet with holes as well as the sheets of filterwool below it.
     
  8. Tim S

    Tim S Thread Starter

    Joined:
    11 Jul 2009
    Posts:
    430
    Likes Received:
    1
    Location:
    Cape Town
    There is no water level as the flow out matches the flow in. There is only about a 40mm layer of water in the bottom of the box while running.
     
  9. sweetnsour

    sweetnsour

    Joined:
    15 Jul 2009
    Posts:
    1,728
    Likes Received:
    8
    Location:
    JHB East Rand
    add socks over the two overflow pipes and all will be sorted! :)
     
  10. sweetnsour

    sweetnsour

    Joined:
    15 Jul 2009
    Posts:
    1,728
    Likes Received:
    8
    Location:
    JHB East Rand
    plus you will be able to add filter wool inside the socks and it will still work just aswell
     
  11. Tim S

    Tim S Thread Starter

    Joined:
    11 Jul 2009
    Posts:
    430
    Likes Received:
    1
    Location:
    Cape Town
    That is a good idea sweetnsour. I'll play with the options to test how it works.

    Later..
     
  12. sweetnsour

    sweetnsour

    Joined:
    15 Jul 2009
    Posts:
    1,728
    Likes Received:
    8
    Location:
    JHB East Rand
    shot man , let us know how it turns out for you , with pictures
     
  13. viper357

    viper357 Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    27,980
    Likes Received:
    776
    If it was me (I don't like filter floss :p), I would remove everything in that overflow box and add two small durso's.

    Otherwise sweetnsour has a good idea.:)
     
  14. Andreas

    Andreas

    Joined:
    14 Feb 2008
    Posts:
    4,251
    Likes Received:
    12
    Location:
    Centurion
    You can perhaps make a plastic sleeve that goes over the elbows that will guide the water towards the perspex grid. Once the water reaches the grid it will desperse nicely over the grid and salt creep will be a thing of the past.

    A clear plastic bag(smallest size)should work perfectly and you will be able to remove the grid to clean out the filter wool without any hassles:)
     
  15. Andreas

    Andreas

    Joined:
    14 Feb 2008
    Posts:
    4,251
    Likes Received:
    12
    Location:
    Centurion
    I only you could say the same about algea:razz:
     
  16. Tim S

    Tim S Thread Starter

    Joined:
    11 Jul 2009
    Posts:
    430
    Likes Received:
    1
    Location:
    Cape Town
    Morning chaps, I put two socks (yes the ones you wear) over the outlets and the splashing problem has been solved. It still however makes a noise. It's got a strange 'gargeling' noise as I think the air that flows with the water needs to escape from the socks and does so something similar to when you empty a bottle of water. I think this can be solved by cutting the bottom of the socks off to leave a 'pipe' like sock. This then ends up with something similar to Andreas' idea.
    Is filterwool commonly used in your systems? What percentage of people use it and those who don't how do you clear the water?

    Tim
     
  17. sweetnsour

    sweetnsour

    Joined:
    15 Jul 2009
    Posts:
    1,728
    Likes Received:
    8
    Location:
    JHB East Rand
    add filter floss to the socks, will quite down alot, if you dont wanna go that route, just puncture a few holes in the socks just above the water line for the aire to escape and it should go quite.

    i have socks on all my tanks overflows and it works well
     
Recent Posts

Loading...
Similar Threads - Overflow issues Forum Date
Overflow issues Anything DIY Related 12 Mar 2015
Overflow fitting help please Pumps and Waterflow Wednesday at 11:47
Drilling and overflow HELP Beginner Discussions 21 Oct 2016
Can you make a algae scrubber in your overflow? Anything DIY Related 25 Sep 2016
[wtd] Overflow box Wanted 3 Aug 2016
Overflow cover up General Discussions and Advice 2 Aug 2016
Plexiglas overflow Anything DIY Related 19 Jul 2016