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shoziku t1_jaddswu wrote on February 28, 2023 at 5:06 PM

Reply to comment by Obizues in How to fix a door that is swinging freely that should be constantly closing back automatically? by Obizues

The "tube" they are referencing is inside the top of the door, where it connects to the door itself. It likely has small adjustment screws you can reach from the top. It might even show a name of the closer model.