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. See our application bulletin for in depth instructions on how to use Qwik System Flush®.