Return Valve

Discussion in 'Beginner Discussions' started by chelmon, 15 Jul 2007.

  1. chelmon

    chelmon

    Joined:
    14 Jul 2007
    Posts:
    44
    Likes Received:
    0
    Location:
    Centurion
    Hi,

    What can I do to prevent the water to flood the sump in case of a power failure?

    I had a non-return valve in, but that slow down the waterflow.

    Please help
     
  2. AdS Guest




    to hide all adverts.
  3. leslie hempel

    leslie hempel Moderator MASA Contributor

    Joined:
    7 May 2007
    Posts:
    14,530
    Likes Received:
    280
    Location:
    Gonubie East London
    hey dude try drilling a hole in the return pipe just under or level to the surface of the water assuming it enters quite deep into the tank. as the power switches off a certain amount of air will enter as it syphon's thus causing am air block and break the syphon. when the power is restored the air will be pushed out and all will be normal...

    testing that this works is very important or else you will have your whole tank emptied onto your lounge floor....

    good luck
     
  4. chelmon

    chelmon Thread Starter

    Joined:
    14 Jul 2007
    Posts:
    44
    Likes Received:
    0
    Location:
    Centurion
    great, it sounds like a plan. I'll give it a try.
     
  5. leslie hempel

    leslie hempel Moderator MASA Contributor

    Joined:
    7 May 2007
    Posts:
    14,530
    Likes Received:
    280
    Location:
    Gonubie East London
    cool just be ready to flick the power switch back on should it not work...:lol:
     
  6. Alan

    Alan Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    5,974
    Likes Received:
    119
    Location:
    KZN
    It will work, as soon as the air is sucked up it will break the syphon, dont trust the non return valves as they do often stick in the open position.
     
  7. Mekaeel

    Mekaeel Moderator MASA Contributor

    Joined:
    8 May 2007
    Posts:
    24,229
    Likes Received:
    127
    Location:
    Point Waterfront Durban
    what size hole are we looking at drilling les?in my case its a 25mm piping
     
  8. leslie hempel

    leslie hempel Moderator MASA Contributor

    Joined:
    7 May 2007
    Posts:
    14,530
    Likes Received:
    280
    Location:
    Gonubie East London
    5mm hole should do fine i went 4mm and it battled.. be sure to clean the burs out of the hole!!!!
     
  9. Mekaeel

    Mekaeel Moderator MASA Contributor

    Joined:
    8 May 2007
    Posts:
    24,229
    Likes Received:
    127
    Location:
    Point Waterfront Durban
    is this what we looking at les?

    [​IMG]
     
  10. Alan

    Alan Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    5,974
    Likes Received:
    119
    Location:
    KZN
    No.... the hole is drilled in the return pipe in the display itself just below the water level.
     
  11. chelmon

    chelmon Thread Starter

    Joined:
    14 Jul 2007
    Posts:
    44
    Likes Received:
    0
    Location:
    Centurion
    My sump is quite small, it will flood easily. I think I will drill it just above water level.
     
  12. KevinW

    KevinW

    Joined:
    6 May 2007
    Posts:
    342
    Likes Received:
    4
    Location:
    Hillcrest
    Chelmon, do you have the option of raisig your return pipe so that it sits on the water surface in your display tank? If so this will work as a quiet return and will also not siphon if teh power goes off.
     
  13. leslie hempel

    leslie hempel Moderator MASA Contributor

    Joined:
    7 May 2007
    Posts:
    14,530
    Likes Received:
    280
    Location:
    Gonubie East London
    no. where the return pipe enters the tank..... and perhaps drill a little closer if not level with the surface....
     
  14. viper357

    viper357 Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    27,980
    Likes Received:
    776
    Bear in mind, if you do that you will have water squirting out of the little hole and possibly make splashes which will cause salt creep.
     
  15. gaz19

    gaz19

    Joined:
    10 Jun 2007
    Posts:
    1,783
    Likes Received:
    10
    Location:
    durban,kloof
    if it slpashes just stick a bit of airtubing in the hole and have it run into your overflow.
    this is what i did. dont remember why i drilled two holes:001_huh:



    [​IMG]
     
  16. Mekaeel

    Mekaeel Moderator MASA Contributor

    Joined:
    8 May 2007
    Posts:
    24,229
    Likes Received:
    127
    Location:
    Point Waterfront Durban
    cool.thanks alan,les.no what you guys mean now
     
  17. Kanga

    Kanga Retired Moderator MASA Contributor

    Joined:
    7 May 2007
    Posts:
    4,576
    Likes Received:
    23
    Location:
    In the Koeberg blast radius
    [​IMG]

    This is where the Hole should be mekaeel, also use one of the air restrictors that come with the Resun powerheads, once you have drilled the hole, you can glue it in and point the flow towards the water, thus having a "syphon break" a centimeter or so above the water
     
  18. chelmon

    chelmon Thread Starter

    Joined:
    14 Jul 2007
    Posts:
    44
    Likes Received:
    0
    Location:
    Centurion
    The airtubing in the overflow is a good idea.

    Tx
     
  19. Mekaeel

    Mekaeel Moderator MASA Contributor

    Joined:
    8 May 2007
    Posts:
    24,229
    Likes Received:
    127
    Location:
    Point Waterfront Durban
    excellent kanga.thank you
     
  20. Kanga

    Kanga Retired Moderator MASA Contributor

    Joined:
    7 May 2007
    Posts:
    4,576
    Likes Received:
    23
    Location:
    In the Koeberg blast radius
    Ur always welcome good man
     
  21. Mekaeel

    Mekaeel Moderator MASA Contributor

    Joined:
    8 May 2007
    Posts:
    24,229
    Likes Received:
    127
    Location:
    Point Waterfront Durban
    cool man :)
     
Recent Posts

Loading...
Similar Threads - Return Valve Forum Date
Pvc non return valve Anything DIY Related 23 Jul 2015
Needing help with a non return valve for Kalkstirrer. Anything DIY Related 25 Jan 2013
non return valve "1/4" fittings Test Kits, Controllers, Reactors and Dosers 18 Jun 2011
Return pump and one way valves for power cuts. Anything DIY Related 4 Jan 2010
Plastic non return valve Anything DIY Related 5 Jun 2009
Non return valve Wanted 16 Jun 2008
External Return Pump Pumps and Waterflow 11 Nov 2016