The requirement for red markings on service valves and tubing when charging with flammable refrigerants is specified by which regulation?

The requirement for red markings on service valves and tubing when charging with flammable refrigerants is specified by which regulation?

• A. OSHA
• B. DOT
• C. CPSC
• D. EPA

Answer: (D)

Color-coding for lines and valves that carry flammable refrigerants is a safety requirement set by the EPA under the refrigerant servicing regulations (part of the Clean Air Act). These rules mandate marking lines and service components used with flammable refrigerants with clear color codes—red is the standard—so technicians immediately recognize a flammable refrigerant system and follow the appropriate safety precautions during charging or service. OSHA handles general workplace safety, DOT regulates hazmat transport, and CPSC focuses on consumer safety, but they don’t mandate this color-marking requirement. That specific coding comes from EPA regulations.

Color-coding for lines and valves that carry flammable refrigerants is a safety requirement set by the EPA under the refrigerant servicing regulations (part of the Clean Air Act). These rules mandate marking lines and service components used with flammable refrigerants with clear color codes—red is the standard—so technicians immediately recognize a flammable refrigerant system and follow the appropriate safety precautions during charging or service. OSHA handles general workplace safety, DOT regulates hazmat transport, and CPSC focuses on consumer safety, but they don’t mandate this color-marking requirement. That specific coding comes from EPA regulations.