3 interconnected sump design question

Discussion in 'Anything DIY Related' started by Pugsly, 9 Oct 2009.

  1. Pugsly

    Pugsly

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    Hi all,

    I cannot have one large sump due to cabinet design. So i have taken 3 seperate tanks that I want to interconnect. I have connected the 1st tank to the 2nd tank via 2* 50mm pvc pipes and connectors and it is nicely set and dry (looks great). Now the tricky part that I want to finish tomorrow;

    I have noticed that in one large sump you guys have a higher water level in the 1st chamber and as it moves towards the return chamber the water level is lower than in the first!?!?!? Is there a reason for this?

    Can I not keep my levels all the same? I know that I can't have the last tank higher, but surely it can be the same as the 1st one?
    I can not really drop the water level of my return tank to much lower than the first.

    Any advice will be much appreciated.
     
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  3. FransSny

    FransSny

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    Pugsly...check my thread 'New tank finally" ...have the same problem and got some good advice already
     
  4. Pugsly

    Pugsly Thread Starter

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    thanks Frans - will go pop in and have a look quick
     
  5. dallasg

    dallasg Moderator MASA Contributor

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    u can keep the levels all the same, the reason most returns have less water is to cater for a little return water when the pump turns off and in case of a small back siphon
     
  6. RiaanP

    RiaanP Moderator

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    It depends on the return pump size. But I found with a 50mm connector that the flow in it is sufficient and that in both tanks the water level are actually at exactly the same height.
    Here is the proof. Yes I did make the one tank stand higher, to cater for different levels, but actually I could have use that top 5cm for more cheato. The tanks are exactly the same.

    [​IMG]
     
  7. Pugsly

    Pugsly Thread Starter

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    ok so the levels can be the same.

    all my holes are drilled 150mm below the top of the tanks so will this help with a power outage etc so nothing overflows will allow space to fill?
     
  8. RiaanP

    RiaanP Moderator

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    Same answer I gave to FransSny
    It depends on the last glass divider before the return pump. If that is at the same height as your connectors, that will be your water level. If it is higher, then the water level will be above the connector.
     
  9. Pugsly

    Pugsly Thread Starter

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    does it matter if the water level is above the connectors Riaan?
     
  10. RiaanP

    RiaanP Moderator

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    No, does not matter at all.

    What happens on baffles, where water goes underneath the glass. The other side is just as high as the inlet side. It does not matter.
     
  11. Pugsly

    Pugsly Thread Starter

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    ok great - thanks allot.

    The first 2 that I connected was easy but this last one is going to be a bugger due to the tight space now. Hoping it goes well though and I don't break anything.
    wish me luck
     
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