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Thread: COR-20 as a replacement for a jebao DC-12000?

  1. #1
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    COR-20 as a replacement for a jebao DC-12000?

    I have a 220G tank with about 300G of water in the system. I have been using two jebao DC-12000 pumps as my return. They are each plumbed with a separate run to both the DT and a 20G frag tank. (So each pump is connected to its own manifold that feeds both the DT and the frag tank) This is for fault tolerance. The pumps are connected to the VDC ports on my apex and I run them at 90%

    Unfortunately one of the pumps failed this morning, but luckily because I have two pumps the system can run indefinitely on the remaining pump (albeit at a lower flow rate than I prefer) so I’m not desperately scrambling to get the tank back up and running.

    So now I’m trying to evaluate options to replace the failed pump (or maybe both pumps). The COR pumps didn’t exist at the time I installed the DC-12000 pumps nearly 3 years ago, but I’m pretty well entrenched in the apex ecosystem and it would be nice to use the apex return pumps as well.

    However I am a bit concerned about flow rates. I’ve got about 6 feet of head and according to the chart the DC-12000 can move about 1850GPH there. I’m only running them at 90%, so that’s brings it down to around 1665GPH. However, the chart for the COR-20 only puts it at about 1300GPH at 6 feet of head.

    That said, I really don’t believe the head pressure charts for the Chinese pumps. From my experience they tend to exaggerate at best or maybe outright lie, so I doubt that I’m really getting 1665GPH from my DC-12000’s.

    Is the chart for COR-20’s reasonably accurate? Has anyone replaced a DC-12000 with a COR-20 and can speak to a flow rate comparison?

    Thanks much,
    Brett

  2. #2
    Frequent Contributor zombie's Avatar
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    The flow charts appear to be reasonably accurate if you can get a correct gauge of the minor and friction losses involved in the head loss calculation. Most people underestimate the losses related to fittings and plumbing and wonder why the flow is less than what the chart says.

    Sent from my SM-G965U using Tapatalk

  3. #3
    New User novadan67's Avatar
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    I know this is an old thread, so sorry if it has been answered... But I just replaced a DC12000 with a Cor20 on my 210g tank. I was running the DC12000 at 50% into 1 1/2" plumbing. I fired up the Cor20 at 50% and it flowed just a bit more than the 12000 at 50%. I'm running dual herbie overflows and I had to open the gate valves slightly. I don't know what would happen at 90%, but I just thought I'd let you know my experience. Did you go with a Cor20? How did it compare to the 12000?

  4. #4
    New User novadan67's Avatar
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    Another interesting thing I forgot to mention... the strainer from the DC12000 fit directly on the COR20, which was a nice surprise!

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