NO FLUSH NEEDED!!!IF YOU HAVE A SYSTEM RUNNING ON R22 THIS IS THE EASY WAY TO SWITCH ON ECO-FRIENDLY REFRIGERANT
-NO RETROFIT REQUIRED
-NO OIL REPLACEMENT REQUIRED
-JUST EVACUATE THE OLD 22 AND CHARGE WITH R422B
R422B can be used to COMPLETELY replace R-22 refrigerant in new or existing R-22
residential and commercial air conditioning systems as well as
non-flooded evaporator chillers. Cannot be added to R-22 unless fully evacuated and recharged with 422B (NU-22B).