New 120 gal sump/overflow problems

Discussion in 'New to Reefing' started by I666NoB666I, Jun 24, 2013.

  1. I666NoB666I

    I666NoB666I

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    I just started a 120 gal with sump and 2 over flows. It keeps making gurgling noises and the overflows keep fluctuating up and down. Doesnt seem stable. I have a 1200 gph pump Tee'd into 2 return pipes, the drains are 2 dufal standpipes. Any ideas?
     
    I666NoB666I, Jun 24, 2013
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  2. I666NoB666I

    mariobrothersleeve squirrel

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    Do you have an inline ball valve?
     
    mariobrothersleeve, Jun 24, 2013
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  3. I666NoB666I

    I666NoB666I

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    No, what is that?
     
    I666NoB666I, Jun 24, 2013
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  4. I666NoB666I

    tritan

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    I am not sure what a Dufal standpipe is but I had the same issue and fabricated my own Durso Standpipes and they work perfectly. All the parts are at lowes. Start with a small hole on the top and make it bigger as needed until the sound is and flow is right.
     
    tritan, Jun 24, 2013
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  5. I666NoB666I

    I666NoB666I

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    Haha, i'm sorry, I meant Durso. I just threw a gate valve in my return. 1 more hour until the cement is dry and hopefully that will fix the problem.
     
    I666NoB666I, Jun 24, 2013
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  6. I666NoB666I

    RockStacker

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    If the water flow through the Durso is too fast, it creates a complete siphon and sucks the water from the overflow chamber faster than the tank water can get into the overflow.
    This will result in significant water level fluctuations within the overflow chamber as it cycles from siphoning and then waiting for the water level to reach the proper level to drain again.
    The gurgling sound usually comes from the air around the lip of the drain pipe getting sucked in along with the water being siphoned. Similar to when a toilet is being flushed.

    To address this, you will need to adjust the size (or number) of air holes at the top of the Durso Cap. The holes at the top should let just enough air in to regulate the pressure inside the standpipe.
    Too little air, and you end up with a complete siphon and too much water flows through.
    Too much air access, and you could end up with a noisy standpipe as the water freefalls down the length of the pipe.

    Start with the smallest drill bit size that you can use, and observe the water level in the overflow chamber for a couple of minutes.
    If it is still fluctuating, then slightly increase the size of the hole, or add a second hole.
    Don't make too big of a hole at once (or too many) as you could overshoot your target.

    You could also use a bigger return pump to match the current overflow setup, but this would be a more expensive option.

    By the way, what diameter pipes are you using for the Durso standpipes?
     
    RockStacker, Jun 28, 2013
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  7. I666NoB666I

    rusty57 VIP Member

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    I had the same issue in my tank but with a single overflow. I installed a valve in the line to the sump to slow the draining into the sump. This solved my issue.
     
    rusty57, Jun 28, 2013
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  8. I666NoB666I

    I666NoB666I

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    The pipes are 1 in. I added an inline gate valve to slow the return. Works great now!
     
    I666NoB666I, Jun 28, 2013
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