M tubing is a type of copper tubing with thinner walls compared to L and K types, making it suitable for light-duty residential water supply lines, heating systems, and some drainage applications. It is marked with red color coding for easy identification. Due to its thinner walls, M tubing is not recommended for underground installations or areas exposed to high pressure, as it is more prone to damage or wear. Proper cutting, cleaning, and soldering of M tubing are essential for creating strong, leak-proof connections in plumbing systems.
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