A flare nut wrench is almost like a boxed end wrench. It has as small part cut out where you can put the wrench on over the pipe and then slide it up on the fitting. This way you want round off the fitting.
I call them line wrenches.

http://www.google.com/webhp?nord=1#nord=1&q=line+wrench

Last edited by Achipmunk; 04/13/2014 2:19 AM.

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