Disposable Cans or Refrigerant Drum

Never use these cans to charge into the high pressure side of the system (compressor discharge port) or into a system that is at high temperature, because the high system pressures could be transferred into the charging can causing it to explode.

If R-12 drum is used, place on scale and note total weight before charging. During charging, watch scale to determine amount of R-12 used.
If 14 ounce R-12 cans are used, close tapping valve, then attach cans following instructions included with manifold adapter.