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  1. #1
    MARSH Sponsor printed3dparts's Avatar
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    Stockman Standpipe Cap Experiment

    Hello,

    I am sure most of you are familiar with the stockman standpipe, one variation or another. I have been busy this weekend experimenting with designing and printing a cap like that as a one piece. I have had mine setup with the PVC adapters you buy at home depot since I installed an external overflow and sump.

    This weekend, I thought of 3D printing a cap that is just a push in on top of a standard PVC pipe. I can print it in any color I want, get matching PVC from BRS etc. Plus I get to have fun designing and engineering this thing. I put the design together, iterated a few times (too small, too thick etc) and came up with a design that I just started testing yesterday. You can find in the pictures attached the design and what it looks like. A few notes on this:

    1) It is printed with PLA. Now, PLA is a reef safe corn based material that is also bio-degradable to some extent. Now, everything I have made so far has had no to minimal contact with water. The only thing I have made that has been extensively in water is a strainer ring in one of my reactors that has been running for over a year with no change in it's mechanical properties or shape. That being said, PLA is expected, according to reputable sources like Randy Holmes Farley, slowly degrade due to bacteria consuming it (it's similar to bio-pellets!) and the high alkalinity might make it somewhat brittle. I do believe though that the time frame for these changes will be in the multiple year span, definitely not months. On the other hand, I can always easily print another if need be. I guess what I am saying is that I don't believe this to be an issue.

    2) I designed the center hole to have threads. You will also find below a screw I put together for it that works like a needle valve (ok somewhat like a needle valve). From my testing it seems to be controlling air flow pretty well.

    3) I am still considering the number of slots and annuls opening non final at this stage to see how much water I can push through. From the testing so far, I can easily push 300 g/h (although I should be able to do more). Now, this number is not an advertised "flow at zero head". This is actual flow from the Apex flow meter on the return pump. To give some perspective, the return pump is a Jebao DC-6000 on the lowest setting which is advertised to do ~1100 g/h at zero head. This gives some insight on real flow in our reefs (kind of a side note but worth mentioning).

    For the reasons mentioned above, I will not offer this as a product (yet anyway) but I would be interested to see if any fellow reefers would be willing to try it out. I can print a couple and send out to you guys to give me feedback on usability of this thing. I do believe there is a matter of convenience involved here and aesthetics vs. the PVC parts route but on the other hand not much can beat the price and availability of those parts.

    Thanks for reading my rant on this effort, I felt it was interesting enough to share and might intrigue someone to try it out or offer constructive feedback.
    Stratos

    Stockman Cap v221.jpg
    Stockman Cap v22.jpg
    20170716_210253.jpg
    Design of cap

    Stockman Cap v22vrent.jpg
    20170716_155313.jpg
    Design of "needle" nut. It's not really a needle but I hope you can see the point. BTW, having threads on the center allows me to put anything there, including a 1/4 tubing adapter.

    20170716_155215.jpg
    one "traditional" arrangement vs. printed part

  2. #2
    Supporting Member Traclly Le Tran's Avatar
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    Seems interesting. Following. Stockman Standpipe Cap Experiment

    Sent from my SM-G935T using Tapatalk
    *Sent from my little corner of the reef. *

  3. #3
    Supporting Member Clownfish Chris's Avatar
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    I am interested in trying them out. I have duel overflows so would need two.

  4. #4
    MARSH Sponsor printed3dparts's Avatar
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    Chris thank you for jumping in. Consider yourself in line for a pair of demo parts. I'm still tweaking the design to optimize flow and usability (more on another update soon). As soon as i have something worth your time you're the first to get it

    Thanks again and I'll keep you updated on the design changes and findings.

    Sent from my SM-G950U using Tapatalk

  5. #5
    MARSH Sponsor printed3dparts's Avatar
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    Just an update on this, i am testing version 2 of the cap for which i made a few changes. I made it a two piece to help with cleaning etc. I'm working on the top piece to muffle the sound as much as possible with a stockman.

    As soon as i tune it I'll print a pair for you Chris if by that time you're still interested.

    I'll keep this thread updated!

    Sent from my SM-G950U using Tapatalk

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  7. #6
    MARSH Sponsor printed3dparts's Avatar
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    Hello,

    As an update to this, I can say I have been running my caps for almost two weeks and I have had no problems at all. They actually look nice and perform well.

    Chris, are you still interested in trying a pair? I would like to get your feedback on this and hopefully your endorsement since I think I will offer them as a product soon.

  8. #7
    Supporting Member Traclly Le Tran's Avatar
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    Quote Originally Posted by printed3dparts View Post
    Hello,

    As an update to this, I can say I have been running my caps for almost two weeks and I have had no problems at all. They actually look nice and perform well.

    Chris, are you still interested in trying a pair? I would like to get your feedback on this and hopefully your endorsement since I think I will offer them as a product soon.
    I think I'd like to try one if you are still offering. Stockman Standpipe Cap Experiment

    Sent from my SM-G935T using Tapatalk
    *Sent from my little corner of the reef. *

  9. #8
    Supporting Member Clownfish Chris's Avatar
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    Quote Originally Posted by printed3dparts View Post
    Hello,

    As an update to this, I can say I have been running my caps for almost two weeks and I have had no problems at all. They actually look nice and perform well.

    Chris, are you still interested in trying a pair? I would like to get your feedback on this and hopefully your endorsement since I think I will offer them as a product soon.
    Absolutely!

  10. #9
    MARSH Sponsor printed3dparts's Avatar
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    Alright, sounds good, I'll print for both of you. I need the feedback to make a successful product out of this so your help will be invaluable! Thank you!

    Are you both using 1" drain?

  11. #10
    Supporting Member Traclly Le Tran's Avatar
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    Yay! Cool, you can send the reeflink holder with it once it's ready and yes I am using a 1" drain. Thanks, will definitely give you feedback!


    Quote Originally Posted by printed3dparts View Post
    Alright, sounds good, I'll print for both of you. I need the feedback to make a successful product out of this so your help will be invaluable! Thank you!

    Are you both using 1" drain?
    *Sent from my little corner of the reef. *


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