Yay! My bung wrench arrived!
When making (or cleaning) rain barrels, if you want to open the two-inch bungs on barrels, the tool for the job is a bung wrench. I chose a plastic wrench instead of metal because I expect I'll have little enough use for it that it will last a long time.
Bungs have two kinds of thread
When you're tinkering with the barrels, be aware that most of them have two different kinds of bungs. The threads on one bung are hydraulic buttress threads (wedge-shaped in cross section), while the other bung uses National Pipe Thread (NPT) -- also called NPS. Some people call NPT a "fine thread" and buttress a "coarse thread". You may be able to identify a sealed bung's type by reading labels on the bung plug (BUTTRESS, NPS or NPT).
That also means that you can screw a two-inch-wide NPT pipe fitting into one of the bung openings, but not the other. But also keep in mind that bung plugs are available with 3/4 inch NPT knockouts in the center, which offers another way to connect pipe to a barrel.
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