How to make PVC Tees to slide on a PVC tube

If you don’t see subtitles click on the Subtitles/CC button (near by the Settings button) - This is a quick guide to show you how to make a PVC Tees to slide on a PVC tube. This is useful for those who want to build some of my cockpits, based on this special feature like the PVC SeatStand 42,43 If you have any questions please write it in the comments below and I’ll try to answer it. (I’m sorry for my bad English in the subtitles)