3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: or [email protected]
There are CAD communities available at: [email protected] or [email protected]
Rules
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No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
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Be respectful, especially when disagreeing. Everyone should feel welcome here.
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No porn (NSFW prints are acceptable but must be marked NSFW)
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No Ads / Spamming / Guerrilla Marketing
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Do not create links to reddit
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If you see an issue please flag it
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No guns
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No injury gore posts
If you need an easy way to host pictures, https://catbox.moe/ may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
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3d extrusion prints have microscopic holes inside, it's porous. I wouldn't trust it depending on the application. You can seal the outside and they also sell additives to lessen the effect (here's a video about it: https://m.youtube.com/watch?v=Q8x-mjjT8j4) but casting resin might be better (haven't tried). Resin printing doesn't have these problems from what I understand but ou can't really stop the print midway.
Fiberglass, if the object isnt complicated to make, would be the best option in terms of quality. Bending and cutting pvc sheets into a box then soldering is also an option. Soldering pvc and rolling fiberglass isn't really difficult but they both require specialized tools/materials. Getting pvc pipes and soldering end caps would probably be the easiest.
How robust you need to make it largely depends on pressure and depth.