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  • Results 1 to 17 of 17

    Thread: Weir waterfall

    1. #1
      kimini is offline Senior Member
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      Weir waterfall

      Pictures pretty much sum it up, fabricated of 316 stainless steel sheet and is the size of a standard 18" x 12" x 6" retaining wall block. It has a 3" inlet and contains baffles to settle the water before it exits
      Attached Images Attached Images      

    2. #2
      gray cat's Avatar
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      Looks great!
      Nancy



      Koiphen 2012 Koi Person of the Year!

    3. #3
      cahriad is offline Member
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      What is the flow rate and how are you feeding it?

    4. #4
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      The skimmer feeds a 1/6 hp W.Lim pump (http://wlimproducts.com/wave1.htm) rated at ~4000 gph at 10 feet and feeds two birdman sand/gravel filters, which gravity-feed the weir.

      Actual flow - that's a good question. Based on the weir being 18" wide and the water being about 1/2" thick (a guess - haven't measured it yet), this thread (http://www.koiphen.com/forums/showth...ation-question) says the flow is only around 1800 gph. Given that 3" pipe was used everywhere, that seems low, but it's not a big enough problem to worry about though.
      Last edited by kimini; 07-10-2017 at 10:19 AM.

    5. #5
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    6. #6
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      Very well done!

      Doug - out
      See Our Pond http://www.koiphen.com/forums/showth...ond&highlight=

      Blank Check Project - Helping those who stand on that wall. www.blankcheckproject.com

    7. #7
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      Nice work!

    8. #8
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      I wish I was that good at welding...
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      "It is far better to be alone, than to be in bad company." --George Washington

    9. #9
      kimini is offline Senior Member
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      Well, that's what it looks like when fit-up is good and I'm just reflowing the metal, except on the inside corners.

    10. #10
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      WOW!


      Great job. You're a very talented person!!
      V

    11. #11
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      Clean job ...



    12. #12
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    13. #13
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      very nice. looks like it is adding some good air into the pond as well.

    14. #14
      kimini is offline Senior Member
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      The weir waterfall is working great - except part of it is rusting! This is "impossible" since 316 stainless was used and fusion-welded, meaning no filler rod was used. I suspect I was sold some "stainless" that wasn't; a bummer since not only did it cost a premium, but fixing it is more work than it's worth. Maybe I'll have it powder-coated, maybe not. Not sure how to avoid this from happening again. It's fairly easy to tell the difference between stainless and mild steel, but difference between stainless alloys is near-impossible if it isn't factory-marked.
      Attached Images Attached Images  
      Last edited by kimini; 09-08-2017 at 07:59 PM.

    15. #15
      tbullard is online now Senior Member
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      Maybe this article will help not that its any good now.

      http://www.sperkoengineering.com/html/Rust.pdf

    16. #16
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      Too bad.

      Those really are some nice welds.

    17. #17
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      Most likely because of contamination from iron or steel dust. I don't know if you use separate tools for each type of steel. I have separate brushes and grinding wheels for each.

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