What is the significance of color-coding refrigerant cylinders?

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Color-coding refrigerant cylinders helps prevent cross-contamination and ensures correct disposal/reclamation. Different refrigerants have distinct chemical properties, and mixing them can ruin recovery efficiency, contaminate reclaimed batches, damage equipment, and create safety or environmental risks. A clear color code provides quick visual identification so technicians use the right cylinder for a given system, recovery, or disposal stream, and it supports proper tracking and regulatory compliance. The other options miss the real purpose: color isn’t about making the cylinder heavier, nor is it for decoration, and it by itself cannot prevent leaks—that relies on proper seals, fittings, and system integrity.