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    Thread: Deepwater Retro-Fit Bottom Drains

    1. #1
      Zac Penn's Avatar
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      Deepwater Retro-Fit Bottom Drains

      These drains have a 10 3/4" diameter and a height of 7 1/2". The four stainless steel legs can be used to set the desired gap from 3/8" up to 1 1/4", as well as level the drain to make up for any inconsistencies in the bottom of the pond.
      The aerated drain has enough mass ( 9 lbs ) for it to stay submerged even with 50 LPM of air going through the low head diffuser. No need for extra ballast like is required with other retro-fit bottom drains.
      The air supply pipe can be customized to whatever you like. You can choose from 3/4" male NPT pipe thread, or a barb fitting can be used for sinking airline. Either way the air connection stays very close to the top of the drain to make sure nothing gets trapped on the pipe inside the drain.
      The non-aerated drain has a domed lid to keep waste from settling on top of the drain, and the edges of the lid have been rounded over for fish safety.
      The pipe connection is customizable from 2" up to 4" so it can work with any desired flow rate.

      Price quotes can be found in my Marketplace:
      http://www.koiphen.com/forums/showth...-Bottom-Drains

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      Last edited by Zac Penn; 02-09-2015 at 06:59 PM.
      Zac Penn.... Not an expert on Pump Testing, no matter what people may think!
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    2. #2
      jimfish98's Avatar
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      I use sinking flex tube on my retro BD. With the aerated BD, can the air fitting be located closer to the pipe connection for ease of piping?



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    3. #3
      Zac Penn's Avatar
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      Quote Originally Posted by jimfish98 View Post
      I use sinking flex tube on my retro BD. With the aerated BD, can the air fitting be located closer to the pipe connection for ease of piping?
      Yes I can rotate the air fitting closer to the water fitting, or anywhere along the drain for ease of installation.
      Zac Penn.... Not an expert on Pump Testing, no matter what people may think!
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    4. #4
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      Very nice! These look very similar to the Aquadyne Rhino retro drains. What's the difference between theirs and yours?
      Attached Images Attached Images  
      Brian



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    5. #5
      Zac Penn's Avatar
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      I couldn't tell you exactly because you didn't provide a link to them in your post. I searched on their website but couldn't find it.

      Just from the pictures...
      It appears as though the legs are not adjustable
      The top is screwed onto the sidewalls
      The diffuser is a cheap high restriction diaphragm
      Hose clamp on the air supply could damage fish
      Pipe inlets are not welded in place
      It appears as though you need to fill a ballast area inside the filter with a heavy material to keep it from floating
      Non-Aerated lids are not domed

      Some of that may be incorrect but that I all I could guess at right now.
      Zac Penn.... Not an expert on Pump Testing, no matter what people may think!
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    6. #6
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      Quote Originally Posted by Zac Penn View Post
      I couldn't tell you exactly because you didn't provide a link to them in your post. I searched on their website but couldn't find it.

      Just from the pictures...
      It appears as though the legs are not adjustable-correct
      The top is screwed onto the sidewalls-Looks welded to me
      The diffuser is a cheap high restriction diaphragm-Explain the difference in their diffuser and yours please
      Hose clamp on the air supply could damage fish-correct
      Pipe inlets are not welded in place-Rhino drains are Sch80 and look to be welded in place.
      It appears as though you need to fill a ballast area inside the filter with a heavy material to keep it from floating-correct
      Non-Aerated lids are not domed-correct

      Some of that may be incorrect but that I all I could guess at right now.
      http://www.aquadyne-filters.com/Rhin...ains-p-49.html
      Brian



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    7. #7
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      Deepwater Retro-Fit Bottom Drains

      It def beats the aqua art retro BD... Filmsy pos.

      Ill take an aerated BD for my Qt to replace the Aqua art

      Pm sent
      Last edited by bbmc88; 02-06-2015 at 06:56 PM.

    8. #8
      Zac Penn's Avatar
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      Just from the pictures...
      It appears as though the legs are not adjustable-correct
      The top is screwed onto the sidewalls-Looks welded to me
      I am attaching a screen shot of a closeup of the drains from that link you provided. It really looks like there are screw holes in the top of the drain. I bet this is where the ballast material gets poured in place.
      The diffuser is a cheap high restriction diaphragm-Explain the difference in their diffuser and yours please
      The Rhino diffuser is from Diffuser Express and at 50 LPM the head pressure is roughly 8" H2O. My diffusers are less restrictive and have 6.8" H2O pressure, and they do not have any plastic exposed for the fish to rub into. It is only rubber that can contact the fish. The Rhino diffuser looks very scary if I was a fish
      Hose clamp on the air supply could damage fish-correct
      Pipe inlets are not welded in place-Rhino drains are Sch80 and look to be welded in place.
      Once again look at the closeup picture and see that there is no weld on the outside of the drain. Maybe it is welded on the inside but I do not know. If they had a picture from underneath like I have then you could see.
      It appears as though you need to fill a ballast area inside the filter with a heavy material to keep it from floating-correct
      Non-Aerated lids are not domed-correct
      Attached Images Attached Images  
      Zac Penn.... Not an expert on Pump Testing, no matter what people may think!
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    9. #9
      Jaymeseywaymsey's Avatar
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      I'm guessing the Deepwater diffuser is a Wilfley-Webber unit?

    10. #10
      Zac Penn's Avatar
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      Quote Originally Posted by Jaymeseywaymsey View Post
      I'm guessing the Deepwater diffuser is a Wilfley-Webber unit?
      Yes that is correct. You can blow through it with barely inflated cheeks They are definitely the most "fish safe" diffuser I have found and it is only slightly higher in cost than the Diffuser Express ones.
      Zac Penn.... Not an expert on Pump Testing, no matter what people may think!
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    11. #11
      Zac Penn's Avatar
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      Quote Originally Posted by bbmc88 View Post
      It def beats the aqua art retro BD... Filmsy pos.

      Ill take an aerated BD for my Qt to replace the Aqua art

      Pm sent

      You wanted a 2" drain with a 3/8" barb fitting to connect your 3/8" ID x 5/8" OD sinking airline.
      So, here you go my friend...
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      Zac Penn.... Not an expert on Pump Testing, no matter what people may think!
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    12. #12
      bbmc88's Avatar
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      now your cooking with peanut oil lol

    13. #13
      Zac Penn's Avatar
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      Mike1950 asked me in a PM if I had tested it at lower pond depths.... So I went over to the Dry Stacked SBC QT Tank and tested the aerated drains at 4' water depth.

      As expected it sunk and stayed put at full blast from my Hakko 45L that I brought over to test at. Based on that depth I believe we were at around 38 lpm of airflow, which is PLENTY of air for a rubber diffuser. I personally like to have them run at 20 LPM max because it just causes too much surface disturbance higher than that.
      Here is an underwater shot and the setup used...
      Sorry that is the best I could do with a 4" coupler and Cell Phone cam...
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      The steel ring is to keep the air tubing from floating. It was about 8" away from the drain so it wasn't holding it down at all. I just didn't want the airline to try and lift the drain.
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      Zac Penn.... Not an expert on Pump Testing, no matter what people may think!
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    14. #14
      Zac Penn's Avatar
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      Oh and by the way incase you were wondering what a standard stucco grey pond coating would look like after 2 years of algae growth there you go!
      Zac Penn.... Not an expert on Pump Testing, no matter what people may think!
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    15. #15
      bbmc88's Avatar
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      Got my BD for the Quarentine tank Zac. Craftsmanship is A+

    16. #16
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      those look nice Zac.. good job
      DAN







    17. #17
      koiman1950's Avatar
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      Thanks for the update/test. I know it isn't easy trying to chase others concerns that may only be academic, but, most all the ponds we build are 5-6+' deep and, as you know I'm sure, the deeper, the more buoyancy can become an issue.
      Mike

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    18. #18
      Zac Penn's Avatar
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      Thanks everyone! I am confident that the bottom drain will have no buoyancy issues at that depth Mike.
      Zac Penn.... Not an expert on Pump Testing, no matter what people may think!
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    19. #19
      koiman1950's Avatar
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      Thanks Zac. Glad to hear this!
      Mike

      check out our website at: http://www.pond-life.net



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    20. #20
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      Hi Zac...I know this is an older thread so hopefully you see it.....
      How do the diff users hold up in a pond that is prone to a nice algae covering on any substrate? Do they clog?
      Is the diffuser the same price with the barber fitting for sinking airline?
      What is lead time? Thanks!

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