R-421A is a drop-in replacement for R22 systems. With this refrigerant there is no need to change the oil. Simply recover the R22 and recharge with R421A.Experiencing R421a problems? Read this guide.
NU-22B® Replaces R-22, R-407C, R-422D and R-417A. NU-22B is the only R-22 replacement you need.
ISCEON MO99 refrigerant the quick switch to replace R-22
R22 Refrigerant, 30lb disposable cylinder. EPA certification required