Dual Overflow Help

Discussion in 'General Equipment, Hardware, Filtration' started by kewpiereefypewpie, Dec 28, 2017.

  1. Neo Jeo

    Neo Jeo Well-Known Member

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    Thanks Im not using a siphon system just an over flow box. I have a strainer on it so snails wont get in.
     

  2. Brew12

    Brew12 Electrical Gru R2R Supporter R2R Excellence Award Reef Squad Leader Article Contributor Build Thread Contributor Partner Member 2018

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    When it comes to drains such as yours they can operate one of 2 ways. Either air can get pulled into them with the water or the air is not pulled in and it is only water. Durso's are designed to pull air in with the water. These can be called partial siphon, partial drain, open drain or any number of other terms. The ones without air being pulled in are called full siphon.

    As an example, a 1" Durso can handle around 600gph of flow. That can go up to over 1000gph when a full siphon is established.
     
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