[rooster]

I have a full propane tank.  Detected a very slight leak at the main Rego style valve.  It seems to be the valve stem packing.  Has anyone changed the stem packing without releasing the contents of the tank.  It would seem that by removing the stem handle "wheel", and removing the packing nut with the valve shut off, one might be able to replace the packing.  Not sure if this is possible, or where to get new packing.  Any suggestions would be appreciated.  Rooster