can you 'recondition' an old A/C drier?

Can do*. I harvested a refrigerator pump and put a screw on manifold fitting on the inlet. It'll pull the needle to the 27.5" on an A/C gauge. If the desiccant is 'out of the bag' I should be seeing some of it in the pump exhaust?

* >>> 27.5" is only 104F so I cannot boil the water out with a vacuum unless I get it under 28" and I may not be able to do that with my rig. Gauge is very small resolution at that pressure. :-( <<<<