Pump airlock problem

Discussion in 'Pumps and Waterflow' started by madmike, 24 Dec 2012.

  1. madmike

    madmike

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    Hi guys

    Could someone please help me? Iv got a pump sucking water out from my tank to my sump, but if the water level drops below the intake pipe it sucks air. Does someone know if there is a way to auto prime the pump?
     
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  3. dallasg

    dallasg Moderator

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    internal or external pump?

    when the pump sucks air or stops, there should be some back siphon that will add water...

    sounds like water level is running to low
     
  4. OP
    madmike

    madmike

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    External.
     
  5. OP
    madmike

    madmike

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    No back siphon as the pump suck water out of the tank so works like a overflow just been sucked instead of free flowing.
     
  6. dallasg

    dallasg Moderator

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    it shouldnt really run dry... is your sump above your tank?
    what you can also do is where the pump intake is, add a 90° elbow and face it down, so that it draws water very low
     
    Last edited: 24 Dec 2012
  7. OP
    madmike

    madmike

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    No my sump is below my tank. There is a straight pipe, then a 90 elbow then a straight pipe then a 90 elbow then a straight pipe don to the pump.
     

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