Leaking laundry faucet, seems too well attached to pipe to come off
This type of valve can be soldered or screwed on, in your case it was soldered making total replacement more difficult. You need to replace the stem packing.  Shut the water off at the source. remove the handle from the stem. Hold the hex closest  to the wall with a wrench or vice grip pliers, You don't want the pipe to turn, when with a second wrench you unscrew the packing nut. Remove the nut along with any old packing. Bring some of the old packing to your local hardware store to match it for size. Wrap a piece of the packing around the stem in a clockwise direction. Reinstall the packing nut. Reinstall the handle. The nut needs to be tight enough to not leak by the stem, but not so tight that the valve handle is difficult to turn