Inflatable pipe plug - GIF

Inflatable pipe plug.

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Previously:

https://www.homemadetools.net/forum/...164#post195647
https://www.homemadetools.net/forum/...634#post178253
https://www.homemadetools.net/forum/...005#post213981
https://www.homemadetools.net/forum/...719#post159599
https://www.homemadetools.net/forum/...824#post100116

Here, the best known are "Cherne". Unsure about this one, those usually are more flat-ended. But inflatable plugs are used in all kinds of instances, available in a wide range of sizes.

They are deflating the inflatable plug.

Ralph

Neat. I'm familiar with carber plugs for hydrotests, but those aren't inflatable.