Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4228888.
Is your water storage up to date? You'll need this to get that plug off your 55-gallon water barrel if you want to be sure. This comes in two versions. Pick which one you like and print the two parts associated with that version.
Whichever files you choose, they are oriented for proper placement without supports. For strength, I recommend 1.6mm walls with 1mm top and bottom layers using 40% tiangular infill. On my printer, the two parts fit securely without the need for glue but your mileage may vary. Sand and/or glue as needed.
NOTE Due to either a Thingiverse bug or (more likely) shadowbanning, my models no longer show up under the [Newest] listings. If you want to see more of my models, please be sure to 'follow' me. If you print this, it would really help if you'd post a 'make' so that others could find this model.