[paws]

I am trying to replace my tub spout with a universal tub spout and I cannot get the old one loose, any idea's?

[JohnSnownw]

Try using a large monkey wrench, for more leverage. It should simply twist off. It's probably stiff due to the teflon plumbers tape around the threads.

[labman]

If it had teflon tape on it, you would likely have it off already. More likely it is pipe dope, crud, rust, and corrosion. A bigger wrench can lead to chopping a hole in the wall to repair what you twisted off. Heating it with a torch and quenching should work. If you don't have a torch, try hammering on it. If you can get at the joint, a little penetrating oil may help. I like spray silicone. The hammering will break up the crystals of oxide locking it in place. Spray, hammer, twist, curse, spray...

[ballengerb1]

Are you sure this spout is screwed on and not a slip on with a set screw? Check on the underside for a possible set screw, if it is there back it out and then pull straight out on the spout with a slight twist. If there is no screw then try Labman's heat/cold approach.