5 Gallon Water Reservoir Cap
thingiverse
Replacement cap for a water reservoir similar to this: https://www.amazon.com/gp/product/B0064O8OYK Threads are sized at M72x3. I printed mine upside down and had to use supports for the lip. The threads didn't have supports and had a lot of loose material in them so if I had to print it again, I might try it right side up with tree supports to give the threads some support. It'll need to be cleaned up either way you go though. I printed it using PETG so it would be safe for drinking water. Enjoy!
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