Technician a Says the CFC-12 (R-12)service Manifold Hose

Multiple Choice

Technician A says the CFC-12 (R-12) service manifold hose fitting must be 1/2-inch male refrigerant flare nut at each end. Technician A says HFC-134a (R-134a) service manifold hoses use an ACME female nut.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B