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Septic clean out cap
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this post was submitted on 30 Dec 2024
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ASA is the peak material for outdoor prints with the best uv and weather resistance. It is quite a bit expensive but worth it imo if it's not something you want to replace every 2 years. Downside is it must be dried before use every time and printed in a good enclosure printer, ideally preheated.
How big is the cap? Is it a threaded pipe clean out cap or a manhole sized cap?
There are codes regulating the loads a septic cap has to support (preventing people from falling in) as well as some need for atmospheric sealing. If you have to print in multiple sections I don't know how tight you can make it and how strong it can really be if there is glue involved.
Agree on ASA. I have some PLA+ prints that have been outdoors 24/7/365 for going on 5 years now and they're holding up really well, so that's another good option.
I've been printing ASA for about a year and a half and haven't dried a spool yet. I guess it all hinges on a mix of relative humidity in your area and how much you care about a flawless finish.
Did you anneal your PLA+ prints (edit: or any other post-processing) or did they go outside straight off the printer?
Straight off the printer! I've never tried annealing and the minimal amount of poking around has been somewhat inconclusive. I tend to change materials when I want different physical properties. The vast majority of my prints are functional, and don't need to be super pretty, so I buy mostly ASA and PETG these days.
IME, PLA prints nicer than PETG, which in turn prints nicer than ASA. Also IME, ASA supports are super nice to remove. PETG is a massive PITA.
Thankfully, I haven't had a print that demanded very nice surface finished and also strength/ruggedness.