removing a shower head/fixture that is stuck

I have a shaving mirror that threads to the shower pipe like a shower head. The shower head then threads onto the shaving mirror assembly.
this pic makes things clear http://picasaweb.google.com/techman41973/UntitledAlbum#5325428747566020722
Recently the whole mirror assembly started leaking water in different locations. I would like to remove it. The problem is that is stuck. I tried different wrenches and even some WD40. It wont come off. I don't want to apply too much force, as I may damage the shower pipe itself. Is there anything else I can try? Thanks
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Maybe put a rag around the arm, and grip it with a pair of channellock pliers? Then you may be able to get a second wrench around the head threads. If the arm does move, you may want to take it out anyway to re-seal the threads inside the wall. Or just get a new arm. They're pretty cheap. Piece of cake. HTH. Tom
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wrote:

Link fixed: (must be google)
http://picasaweb.google.com/techman41973/UntitledAlbum#53254287475660

I stopped using rags years ago. For bath fixtures, using channel locks I prefer a strap of leather. Even a strip of rubber from an inner-tube. There is also the option for a strap wrench.
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Good thinking. Tom
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techman41973 wrote:

Slather the thing with substances specially made for loosening stuck pipes.
Hint: When replacing a threaded device, snug it up, then back off a quarter-turn. This makes it easier to remove in the future. You may be able to tighten the device that slack 1/4 turn to break the corroded weld.
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