The basics of pipe wrenches - the tools that are used to tighten threaded pipes.
Pipe wrenches are pretty simple in their design but very effective at applying torque to round pipes. Among standard hand tools, there aren't really any substitute tools that can do what they do -- when you need one, you need one.
Of course, if something a little less beefy (and a little less torquey) will get the job done, check out Adjustable-jaw Pipe Pliers: • Adjustable-jaw Pipe Pl...
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All linked pipe wrenches are RIDGID brand, same brand as shown in the video.
Noted pipe sizes are "ideal" handling size according to the manufacturer -- wrenches can usually handle the next size up if they have to.
Straight-handle pipe wrenches:
6-inch (for 1/8" to 1/2" pipe): amzn.to/3hWvZiF (shown)
8-inch (for 1/4" to 3/4" pipe): amzn.to/3hxVAiK
14-inch (for 1/2" to 1-1/2" pipe): amzn.to/2T3iwNw (shown)
24-inch (for 1-1/2" to 2-1/2" pipe): amzn.to/2T6JQKU (shown)
36-inch (for 2" to 3-1/2" pipe): amzn.to/3e86HNi
48-inch (for 3" to 5" pipe): amzn.to/3xFvekQ
60-inch (for 3" to 8"!!! pipe): amzn.to/2VBOFgh
14-inch End Pipe Wrench (angled handle - for 1/2" to 1-1/2" pipe, like it's straight-handled counterpart): amzn.to/36rF0uR (shown)
14-inch Offset Pipe Wrench (perpendicular handle - also for 1/2" to 1-1/2" pipe, like it's straight-handled counterpart): amzn.to/3hzGvgY