Jan 18, 2019 Copper Menu Copper Information Fixing Copper Tube Copper – Internal Working Pressure Type K* Copper – Internal Working Pressure Type L* Copper – Internal Working Pressure Type M* Copper – Internal Working Pressure DWV Copper Tubes Copper Tube: Type K Copper Tube: Type L Copper Tube: Type M Copper Tube: Type DWV Copper Tube: Type ACR – drawn Copper Tube: Type ACR – annealed Copper Tube: Medical Gas K,L by PipeAdmin