How to build an overflow in a tank that is not drilled

Discussion in 'General Reef Topics' started by bulldogniner, Sep 22, 2010.

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  1. bulldogniner

    bulldogniner Feather Duster

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    Not sure which forum to put this in so....

    I was wondering if someone could explain how to build an overflow in a tank that is not drilled. I have another tank I want to use as a sump but I'm not sure how to get the water to it like I have in my other tank that has an overflow.
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  3. Broaner

    Broaner Feather Duster

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    Great thread. Interested to hear everyones thoughts because I'll be doing this on my 90 cube soon. Order of thoughts in my head.

    1. Order 3 of the the correct bulkhead fittings.
    2. Order correct diamond encrusted drill bit.
    3. Figure out standpipe situation.
    4. Order premade overflow box from Internal Overflow Boxes
    5. Mock everything up and triple check everything before marking.
    6. Build dam out of plumbers putty and fill with water.
    7. Drill tank one hole at a time. Take breaks for relaxation between.


    Missing anything?
  4. blackraven1425

    blackraven1425 Giant Squid

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    So, I'm not quite understanding. Did you want to drill the tank, or use an overflow box?
  5. bulldogniner

    bulldogniner Feather Duster

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    i didn't want to drill the tank. How could i get water from the main frag tank to the sump without drilling?
  6. scott26

    scott26 Ritteri Anemone

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    You have a few different options depending on wether you tank is tempered or not that will be the first thing you need to figure out after that you can choose to drill the bottom if not tempered or drill the back if not tempered and with these two drilling methods you have a few options.

    Bean Style Overflow
    Herbie Style Overflow
    Durso Standpipe Overflow
    Glass Holes Overflow

    All these above will get the job done of transfering water to the sump but each have there own perks I prefer the bean becuase is it silent and has 2 back ups from the main drain for saftey from floods.

    Other then that you are stuck to go with a hang off the back set up which I do not reccomend since they are prone to fail if not taken care of well and kept clean.

    As far as overflow boxes them selves go I would suggest making your own out of glass if a glass tank or acrylic for an acrylic tank.

    Any other questions?
  7. xmetalfan99

    xmetalfan99 Giant Squid

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    Using an overflow box.

    I used these. These are also good when set up properly. If you decide to go with a CPR you will also need one of these.

    There are a number of people that claim using an overflow box is not reliable and will cause an overflow when the siphon breaks after a power outage. This is simply incorrect. A properly set up overflow box will never overflow.
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  9. blackraven1425

    blackraven1425 Giant Squid

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    Forget the CPR; that's an overly-complicated system, IMO. No pump should be needed for an overflow to keep air bubbles out, especially when there's designs like the eShopps (an overflow I use) that work extremely well without one. Just one more part to fail, again IMO.
  10. bulldogniner

    bulldogniner Feather Duster

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    Yeah, I think that would work perfect. I was thinking of a 40 gallon breeder as the main tank and a 20 gallon long as the sump with a refugium. I'd just have to get some glass or plexiglass separators to make the refugium
  11. yamaharider73

    yamaharider73 Kole Tang

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    ^^^^^+1 the simpler it is the easier it will be to keep up with
  12. reefmonkey

    reefmonkey Giant Squid

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    Go with an Eshopps PF model overflow with the U Tube. Quality equipment with an affordable price tag.