Types of Copper Tube

All copper tube supplied is manufactured to meet the requirements of specifications established by ASTM. All tube supplied to these ASTM standards is a minimum of 99.9% pure copper. The table below identifies the six standard types of copper tube and their most common applications.

Download the PDF of this product brief: Types of Copper Tube

Straight Lengths
Tube Type Standard Application Nominal Size Drawn (Hard) Annealed (Soft)
Type K & L ASTM B88 Domestic Water, Fire Protection, Fuel/Fuel Oil, HVAC, Compressed Air, Natural Gas, LP Gas, Vacuum 1/4" to 10" 20' 20'
Type K & L ASTM B88 Domestic Water, Fire Protection, Fuel/Fuel Oil, HVAC, Compressed Air, Natural Gas, LP Gas, Vacuum 12" 18' 18'
Type M ASTM B88 Domestic Water, Fire Protection, Fuel/Fuel Oil, HVAC, Compressed Air, Vacuum 1/4" to 12" 20'
DWV ASTM B306 Drain, Waste, Vent, HVAC, Solar 1-1/4" to 8" 20'
MED ASTM B819 Medical Gas, Compressed Medical Air, Vacuum 1-1/4" to 8" 20'
ACR ASTM B280 Air Conditioning, Refrigeration, Natural Gas, LP Gas, Compressed Air 1-1/4" to 8" 20'
Coils
Tube Type Standard Application Nominal Size Annealed (Soft)
Type K & L ASTM B88 Domestic Water, Fire Protection, Fuel/Fuel Oil, HVAC, Compressed Air, Natural Gas, LP Gas, Vacuum 1/4" to 1" 60'
Type K & L ASTM B88 Domestic Water, Fire Protection, Fuel/Fuel Oil, HVAC, Compressed Air, Natural Gas, LP Gas, Vacuum 1/4" to 1" 100'
Type K & L ASTM B88 Domestic Water, Fire Protection, Fuel/Fuel Oil, HVAC, Compressed Air, Natural Gas, LP Gas, Vacuum 1-1/4" to 1-1/2" 60'
Type K & L ASTM B88 Domestic Water, Fire Protection, Fuel/Fuel Oil, HVAC, Compressed Air, Natural Gas, LP Gas, Vacuum 2" 40'

Types K, L, M DWV and MED tube are all designated by ASTM standard sizes, with actual outside diameter always 1/8" larger than the standard size designation. Each type represents a different wall thickness. Type K tube is has thicker walls than type L, and type L walls are thicker than type M for any given diameter. All inside diameters depend on the tube size and wall thickness. Type ACR tube is designated by actual outside diameter.