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Qwik System Flush patented formulation is 9 - 10 times more effective in acid removal, moisture & oil absorption than competitive products. Qwik System Flush is the ultimate solution for removing refrigerant line impurities during system change-out from R-22 to R410a or clean-up after a burnout. Qwik System Flush is OEM Approved. Qwik System Flush is used to flush contaminants such as debris, residual oil, acid, and moisture from refrigeration line sets. If you can't replace refrigeration line sets after a burnout or R-22 to R-410A change out, then you should use Qwik System Flush to remove residual contamination.