Replace corroded laundry hoses without ruining the valve by slitting them with a Dremel tool so the hose end will release.
Cut through the hose end a little at a time until the slice extends through the metal. Don't forget your safety glasses. Make two slices on opposite sides of the hose end.
If you still can't unscrew it, pry it loose with water pump pliers. After you've removed the hose, clean off any remaining rust and corrosion from the valve threads with a wire brush.
Rusted-on laundry hoses are nearly impossible to unscrew. If you need to remove or replace your laundry hose and just can’t get it loose, here’s the solution. Carefully cut through the hose end. Try to avoid cutting too deep, but don’t worry if you nick the threads on the valve. The threads don’t seal the connection. That’s taken care of by the rubber washer. You can use a hacksaw to make the cuts, but a Dremel tool with an abrasive cutoff wheel works even better (Photo 1). Cut the hose end in two places, then try to unscrew the fitting with water pump pliers or a pipe wrench. If it’s still stuck, break it off with the pliers (Photo 2).