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  1. #1
    Member kokain00's Avatar
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    Exclamation Water Leaking!!!!!

    Hey guys,

    We have come across a problem, we just added a sump to our existing display tank.

    Since our overflow is so short we had to raise the water level in the display tank for the water to be accessible to it. Now the water is leaking out of the tank, Its traveling under the black plastice at the top of the tank and coming out the other side....

    2 methods I see to fixing this... lower the water level for 24hrs while we caulk the inside (between the plastic molding and the glass) or start cutting up the overflow...

    Its a CPR50 overflow 300GPH, What are these made of? (the whole box is black in color) Acrylic??? can I use a dremel tool to cut slots into the front of it to totally lower the water volume in the display tank???

    Thanks!!!

  2. #2
    Former Moderator a4twenty's Avatar
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    Quote Originally Posted by kokain00 View Post
    Its a CPR50 overflow 300GPH, What are these made of? (the whole box is black in color) Acrylic??? can I use a dremel tool to cut slots into the front of it to totally lower the water volume in the display tank???
    they are either acrylic or plastic, either way the dremel idea sounds the best to me. just don't lower it to much or you'll be able to see the top of the water around the plastic bracing. the silicon idea scares me a bit because it won't adhere water tight to the plastic bracing and there will always be a chance of a leak with the water level still up high.

    HTH and post some pics if your unsure.
    `

    120S RR tank with 60G basement sump / fuge

    Return Pump: Little Giant 4-MDQX SC
    Water Movement: MP40W, Seio 1500, (2) Hydor K4's
    Lighting: 400W SE MH with 10K Venture
    Skimmer: Euro-Reef RS250 with gate valve
    Other: RODI, RDSB, PO4/AC reactor


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  3. #3
    BWI
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    yea i would also just drill or cut the slots/holes larger in the overflow!

    Building Quality not Quantity

  4. #4
    Member kokain00's Avatar
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    any special bits to use, i'm pretty sure its acrylic, you can't flex it at all

  5. #5
    Member kokain00's Avatar
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    I have just thought of a probably cause, perhaps my return is pumping to much water for the overflow, but I don't see how its possible...

    The overflow is rated at 300GPH, the return pump is a pondmaster 500(500GPH) but theres 5 feet head give or take a few inches, the pondmaster is the same as the mag 5 I think. and at 5 feet head it should be returning 250GPH. I don't get why the sump level keeps lowering, and the display leaking

  6. #6
    Former Moderator a4twenty's Avatar
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    you could use a b-valve to hold the pump back.


    are you doing anything to prevent air getting in the overflow system?? ( lose it's prime )
    `

    120S RR tank with 60G basement sump / fuge

    Return Pump: Little Giant 4-MDQX SC
    Water Movement: MP40W, Seio 1500, (2) Hydor K4's
    Lighting: 400W SE MH with 10K Venture
    Skimmer: Euro-Reef RS250 with gate valve
    Other: RODI, RDSB, PO4/AC reactor


    My Gallery

  7. #7
    Member kokain00's Avatar
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    well I have a tube inserted into the drain line from the top of the overflow, I can turn the pump on and off over and over and it will start up everytime

  8. #8
    Former Moderator a4twenty's Avatar
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    what size pipe goes from the overflow to the sump?

    you can install a ball valve directly after the pump and use it to reduce the flow from the pump or you can install a 'T' and b-valve and use the extra flow to feed a refugium or reactor or even just to direct it back into the sump to prevent an overflow.

    when the system is running how much water is above the top lip of the overflow? ( in inches )
    `

    120S RR tank with 60G basement sump / fuge

    Return Pump: Little Giant 4-MDQX SC
    Water Movement: MP40W, Seio 1500, (2) Hydor K4's
    Lighting: 400W SE MH with 10K Venture
    Skimmer: Euro-Reef RS250 with gate valve
    Other: RODI, RDSB, PO4/AC reactor


    My Gallery

  9. #9
    Member kokain00's Avatar
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    well its hard to say but I think about 1/4-3/8" above the overflow.

    I added a couple 90's to try and slow the return down a bit and i'm also thinking of adding a second return pipe onto the display (one on each side) with the overflow in the middle to get max. surface penetration (and slow the flow a bit more.

    http://s248.photobucket.com/albums/g...k6weeks058.jpg

    http://s248.photobucket.com/albums/g...k6weeks055.jpg

    http://s248.photobucket.com/albums/g...k6weeks053.jpg

    A couple shots of the overflow

  10. #10
    liv
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    Former Moderator liv's Avatar
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    just had a look at the pictures.. If you can, you should really cut down on the overflow lip to try and lower it by a good 1/2" ( if you go that much to spare ). It may also be a good idea to seal the seam once that has been done.

    moving.. so temporarily out of SW :b8:
    planning next tank, possibly 60x30x20 on 2x plasma.
    updated: 2011/05/30

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