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  1. #1

    Installed my Iwaki 20RZ, pics

    Here it is:


    I made a redwood box for it:


    My radiator, for those who havn't seen it yet (50' of 3/4" copper, burried in wet ground):


    My temps have dropped 3C using this pump. Before I was using a Groundfos circulation pump with similar head but much higher GPH (1250 GPH) and higher wattage (185W). My overclock didn't increase. I switched to the Iwaki to lower my electric bill.

    Here's the rest of the pics. I got rid of condensation by sealing up my case so no air goes in or out and pumping the cold water through a heatercore and fan inside the case which cools the air while recirculating it.
    Last edited by pelikan; 06-26-04 at 06:59 PM.

  2. #2
    Member Styyn's Avatar
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    May 2004
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    St. Paul, MN
    Far and away one of the most ingenious (and quiet ) watercooling setups I've seen. Do have one question though: how's your flow with that much tubing? I know Iwakis have a lot of head, but that's really gotta be pushing that 20RZ

  3. #3
    Member Soja's Avatar
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    Jan 2001
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    OC, CA
    I think he had a eheim 1250 pushing through all of that if I'm not mistaken. If that pump worked than the 20RZ should be a worthy upgrade.
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  4. #4
    Disabled greenman100's Avatar
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    May 2003
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    trying to keep all the magic smoke in
    funny to see something I once had now installed, far far away.


    glad to see its working for you, nice setup

  5. #5
    Thanks for selling me the pump greenman100.
    That's right, I used to have an eheim 1250 in there. The flow was, suprisingly, pretty good. Since the copper is 3/4", it is not very restrictive at all. I think I calculated a 2' pressure drop in the 50' of pipe.
    Then I got a Grundfos pump for free. That thing has 25' of head and 1250 GPH. I was getting about 4 GPM with it. It worked great but it used 185W and I got sick of paying a higher power bill.
    This Iwaki is perfect. I'm getting pretty close to the flow I got with the Grundfos, but with only 55W.

  6. #6
    Member Ri0's Avatar
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    May 2004
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    Madison, WI
    What makes the ground wet? How deep is the copper tubing burried?

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  7. #7
    Here's a pic from just before I trimmed the plastic and filled the dirt back in. It's burried about two feet deep. The plastic keeps water in.

  8. #8
    The heatercore in this pic isn't cooling the water. Its job is to keep the case cool using the cold water from the burried radiator outside. I covered all the holes in the case with duct tape and put the psu outside the case. So with the side panel on the case is comletely sealed. I did this to stop the occasional condensation problems I was having. It's a cool, dry little micro-environment in there.

  9. #9
    Member Aphex_Tom_9's Avatar
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    May 2004
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    NY (Long Island)
    that's crazy! and by crazy i mean awesome!

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  10. #10
    Member InvisGreenMan's Avatar
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    Jan 2004
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    South Dakota
    It looks like you are cooling your intake air with that rad in the front, right? If so that is a great idea. Looks like you have a sweet setup.

  11. #11
    Quote Originally Posted by InvisGreenMan
    It looks like you are cooling your intake air with that rad in the front, right? If so that is a great idea. Looks like you have a sweet setup.
    Actually there is no intake or exhaust. The air inside the case stays inside and is re-circulated through that rad. This way it stays cool and dry inside the case regardless of what's happening outside. I used to get condensation whenever I'd cook things like soup which add a lot of humidity to the air, but this solved the problem.

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