Comparison of Type K, Type L, and Type M copper tubing with the same outside diameter, showing progressively thinner walls and larger inside diameters from K to M.

Copper Tube Grades Explained: Type K, L, M and HVAC Applications

“We need a better copper grade” can mean several different things on a purchase request. The engineer may want a thicker wall. The fabricator may need a softer temper. The purchasing team may be asking about alloy chemistry. Those changes should not be hidden behind the same word. When buyers search for copper tube grades, […]

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