Can You Mix R22 And R421a?
Can You Mix R22 And R421a? Can you mix r22 and r421a? Can a system running on R-22 be topped off with R-421A? the simple answer is no. If a technician were to “top-off” an R-22 system with R-421A, they would essentially be creating a refrigerant mix that is not authorized by the EPA. It