Bending metal tubing or pipe without kinking it can be challenging, if not impossible, without the proper tool. While small-diameter tubing can be successfully bent by a variety of simple methods, larger pipes require a dedicated bender. If you need one, you already know it, so check out these videos for ideas:

Homemade Metal Bender by j morley

homemade tube bender mandrel by T Jussilainen

Bending Tube and Pipe without kinking it by sixtyfiveford

homemade tube bender by ohmster101

Homemade tube bender/roll bender by Dorian kerr

HomeMade Pipe Bender by BentRZR