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Thread: 2" Flow Meter

  1. #1
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    2" Flow Meter

    Hey All,

    Just putting this out there. Comment if you have any ideas or suggestions.
    I recently added a 2" flow meter with my apex 2016. Ive updated the firmware of apex and FMM module.

    The 2" flow meter is plumbed in a funny way other than that i dont see any other issues. The arrow is pointing the right way and is set to LPH. Its def LPH as if I get to GPH the rate drops. Originally I had it in port 1 of the FMM but that didnt detect anything. I tried port 4 and it started to read some stats.

    I have it plumbed it into 25mm metric plumbing using unions as per attachment. Im using Aqua Media DC runner 9.1 rated at 9000LPH. I currently have it at max.

    The flow rate im getting at the moment is 2100-2200.

    Any ideas and do people think its reading it incorrectly? Visually the tank appears to be passing way more than 2200LPH!

    Guess its not that big of a deal (as long as the flow drops by say 50% it will let me know) but i did pay for it, maybe i did something wrong???

    Thanks all.
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  2. #2
    Frequent Contributor zombie's Avatar
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    What is the vertical height it needs to pump and approximately what is the total length of pipe and how many bends do you have? If this is coming from a basement, that is exactly the flow I would expect from that pump.

    You might be an engineer if...You have no life and can prove it mathematically.

  3. #3
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    Red Sea P650 Tank
    2x 90 arch bends.
    Straight into the tank from the sump.

    Doesnt go far at all :/

  4. #4
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    Quote Originally Posted by wshinji View Post
    Red Sea P650 Tank
    2x 90 arch bends.
    Straight into the tank from the sump.

    Doesnt go far at all :/
    Ya sounds about right flow. I’d let Zoombie do the head pressure math but here’s the head pressure chart for your pump




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  5. #5
    Frequent Contributor zombie's Avatar
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    Quote Originally Posted by wshinji View Post
    Red Sea P650 Tank
    2x 90 arch bends.
    Straight into the tank from the sump.

    Doesnt go far at all :/
    That I would expect in the 4000-5000 lph range.

    You did make sure to configure it as a 2" sensor right?

    You might be an engineer if...You have no life and can prove it mathematically.

  6. #6
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    Pictures of plumbing setup in sump.


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  7. #7
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    2" Flow Meter

    Quote Originally Posted by zombie View Post
    That I would expect in the 4000-5000 lph range.

    You did make sure to configure it as a 2" sensor right?

    You might be an engineer if...You have no life and can prove it mathematically.
    Hey, wouldn’t the plumbing reduction to 5/8 eat close to 40% of the head pressure?

    I assumed a 9000LPH pump would have 1 1/4 or 1.5” outlet.


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  8. #8
    Frequent Contributor zombie's Avatar
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    Quote Originally Posted by XLOR8T View Post
    Hey, wouldn’t the plumbing reduction to 5/8 eat close to 40% of the head pressure?

    I assumed a 9000LPH pump would have 1 1/4 or 1.5” outlet.


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    Nope. He is running 25mm (about 1 in). The two reducers would be similar loss to that of a 90 for each one.

    You might be an engineer if...You have no life and can prove it mathematically.

  9. #9
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    Thanks all for all the feedback. Will get sump layout and photos tonight when i get home from work. Yes, set to 2" in Apex.

    Yeah, plumbing is my only concern that could cause this however i dunno how by much. Return is all 25mm metric just for that flow bypass which is the piece in the photo. So i would think it shouldnt have too impact as the flow sensor section is bigger and the plumbing just before the flow meter is 25mm all the way to the return pump.

    in addition to this im new and have no idea on how else to check if the flow meter is ever working properly. got concerned as i cant even get a reading in port 1 via the FMM. Might try port 1 again to see if it detects any measurements.

  10. #10
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    Sorry for the delay. ok here we go with the bad green arrows. I couldnt take a full pic so I have 3 photos that make up my sump/return plumbing. Red sea P650 so the cabinet from right to left is 1.6 meters.

    11.jpg22.jpg33.jpg

  11. #11
    Frequent Contributor zombie's Avatar
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    You should be getting 4000-5000 gph with that setup.

    You might be an engineer if...You have no life and can prove it mathematically.

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