I can't find the Pipe Joint modifier or Add Mesh: Extra Objects (as in the other question). Is the name changed again ?
Hey Dulan, Extra Objects is an addon which you can find in the User Preferences under Addons. If the Pipe Joints one isn't in the most recent version of Blender, you can still download it here: https://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Add_Mesh/Add_Pipe_Joints
https://blender.stackexchange.com/questions/27407/where-is-the-pipe-joint-addon-in-blender-2-7-3