SylvanLMP
I never saw a compression NUT on a hose bibb connection. I am sure some codes that the inspectors look the other way may have it.
I would take a hack saw blade and slowly and gently cut the washing machine connection nut carefully (lenth wise)CAREFUL not to cut into the bibb threads.
Then using a very sharp chisel Or an old screw driver gently split open threads nuts that you just scored with the hack saw blade.
this Works 96.8% of the time.
A lot of low life installers actually solder the bibb valve into place rather then spending the extra . 45 CENTS for a female copper adapter and thus making valve changing much easier.
There are also those who have no clue as to the various types of temper of copper tubing.
For example.
Temper describes the hardness of the tubing and in the trades we call drawn temper as hard although drawn can be furnished in a “bending” temper.
Annealed tubing is referred to as soft tubing and THIS is the type that should be used with compression adapters for the folks who do not know the proper job in making connections.
The stumble bums who resort to compression type valves never take into consideration the vibration a washing machine causes with the solenoid valves opening and closing.
Also you may not even have a copper piping system but a brass or galvanized connection to a regular hose bibb (Also called a hose cock).
Try using the fine tooth hack saw blade 1st THEN if you should run into a problem THEN you can always call a local Licensed plumber.
