How to prevent a back syphon

Discussion in 'General Reef Topics' started by saltyfresh, Mar 2, 2011.

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  1. saltyfresh

    saltyfresh Corkscrew Tentacle Anemone

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    Well as the title says what do u do to prevent a back syphon from starting in ur return pump


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  3. benbabcock

    benbabcock Bubble Tip Anemone

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    Drill a hole in the return line just below water level. When it begin to back siphon it will suxk air and break . Problem solved
     
  4. JP909

    JP909 Feather Duster

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    Add a check valve. Flap style non spring style.
     
  5. saltyfresh

    saltyfresh Corkscrew Tentacle Anemone

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    I tried this but I did not work well.
    How big of a hole do I need.
    Is there any other way than a check valve.


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  6. saltyfresh

    saltyfresh Corkscrew Tentacle Anemone

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    They are so expensive because the home depot ones won't work


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  7. K3rack

    K3rack Peppermint Shrimp

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    A very small hole will work, enough to get air inside. Another thing you can try is mount the return hose just below the water line, that is safer.
     
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  9. saltyfresh

    saltyfresh Corkscrew Tentacle Anemone

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    Ya cuz I had a large hole and it did not work and I like the idea of just having it right below the water line


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  10. 2in10

    2in10 Super Moderator Staff Member

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    You want to drill 2 holes opposite each other on your return, I found 3/16" worked the best for me.
     
  11. dnyce78

    dnyce78 Astrea Snail

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    I use the same size. Although I found it unnecessary to drill it below the water line if you're drilling the hole facing down. You get a steady stream of water into the tank from the hole but it's not noticeable. At least not on my tank and I'm using a 100PX Pan World pump for my return.
     
  12. saltyfresh

    saltyfresh Corkscrew Tentacle Anemone

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    Ok so I will try this to night and post back in my build thread


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