Propane tank valve removal

Yeah ... even a little 12" pipe wrench would do the trick. Just check the teeth to make sure they're still sharp if buying used ... otherwise you won't be able to get a bite on it.

The big problem is that the valves are usually screwed on pretty tight. If you can find an 18" long piece of 1.5" galvanized to slip over the handle of whatever wrench you're using that will usually give you enough leverage to crack them free.

I use my skid loader to force the 100 lb. tanks to the ground which acts as a vice and use a large pipe wrench and a cheater bar. I've never tried it, but it might work to use a heavy wooden plank as a ramp and drive your vehicle up on top to hold it down.