RSS Terrible Advice Tuesdays (T.A.Tues): The Tank That Never Needs To Be Topped Off

Discussion in 'RSS Feeds' started by MASA Admin, 4 Sep 2013.

  1. MASA Admin

    MASA Admin Moderator

    Joined:
    8 May 2007
    Posts:
    10,129
    Likes Received:
    101
    Terrible Advice Tuesdays:*To avoid setting up a top off reservoir or having to refill your top off reservoir, just plumb the output line from your RODI unit straight into your sump. Then install a float switch shut off valve to turn on/off the water flow as the water evaporates out of your tank.

    The rest of the story: Please don’t EVER do this…EVER. The reason is that if the shut off valve fails then your RODI unit will continuously make water and empty the water into your tank. Your sump will fill with water and then overflow all over your floor.

    Oh and don’t forget that you’ll be continuously filling your tank with freshwater, so your saltwater tank will become a freshwater tank, killing everything inside.

    The safest way to set up your auto top off unit is for your RODI unit to be plumbed into a holding container that is separate from your tank AND separate from your top off container. This will prevent your tank from continuously having freshwater pumped into it in the event of a float valve or switch failure.

    Again, please don’t ever plumb your RODI until straight into your tank or top off reservoir. Just last week I got an email from a viewer who made this mistake and he came home to flooded house.



    [​IMG]
    Click here to view the article....
     
  2. AdS Guest




    to hide all adverts.
  3. Christo

    Christo

    Joined:
    4 Jun 2008
    Posts:
    1,130
    Likes Received:
    87
    Location:
    Vaalpark, Vaaltriangle
    Agree and Disagree! There is ways to Fail Safe this situation!
     
  4. Quintin

    Quintin

    Joined:
    30 Aug 2010
    Posts:
    1,607
    Likes Received:
    37
    Location:
    Ruimsig
    Get yourself one of these and you will have no problem.....

    1.jpg
     
  5. WarrenElvis

    WarrenElvis

    Joined:
    31 May 2011
    Posts:
    613
    Likes Received:
    12
    Location:
    Durban
    Or just pay the price and install a tunze osmolator, the main sensor is an optic sensor. Should that fail a safety float switch shuts the unit off and sounds an alarm. Even if that fails safety circuitry shuts off the pump after 10 minutes. It pays to be safe
     
  6. Quintin

    Quintin

    Joined:
    30 Aug 2010
    Posts:
    1,607
    Likes Received:
    37
    Location:
    Ruimsig
    Or pay R45.00 for my solution.
    No alarms, no circuits, no power, no name brands.
    Just plain old mechanics and power of water Vs air pressure...
     
  7. WarrenElvis

    WarrenElvis

    Joined:
    31 May 2011
    Posts:
    613
    Likes Received:
    12
    Location:
    Durban
    The problem with hooking your RO/DI directly to the tank goes beyond the reliability of the float valve itself. Even if the float valve never fails you can still fresh out your tank. If your skimmer overflows and spills water out of the sump or you have a hose spring a small leak the water level in the sump will keep dropping. The float valve will work as designed and continue to dump freshwater into the sump. Regardless of how well you design your auto topoff, you should not hook an unlimited supply of fresh water up to your tank.
     
  8. Quintin

    Quintin

    Joined:
    30 Aug 2010
    Posts:
    1,607
    Likes Received:
    37
    Location:
    Ruimsig
    Ah,but now we are going into the realm of RTFM and thinking ahead and building redundancy checks into your system....:whistling:

    Common sense would dictate putting a float switch on your skimmer if you are letting the skimmate empty into a container other than your skimmer cup.

    Another thing I see many reefers tend to forget is that you can flood your tank if the display return pipe/s are blocked. This will pretty much mean flooding your sump contents into your display tank or up to water level of the pump intake...
    So a good idea to have a float valve installed over your display tank that will cut off your return pump, should the water level rise too high in the display tank....

    Post number 589 onwards on my thread will show you how to build one....
    New Tank Build plus electronics - Page 30 - Marine Aquariums South Africa

    1.jpg
     
    Last edited: 4 Sep 2013
Recent Posts