Type DWV copper tube is marked with which stripe color?

Type DWV copper tube is marked with which stripe color?

• A. Red
• B. Yellow
• C. Blue
• D. Green

Answer: (B)

Copper tubing uses color-coded stripes to show the intended service. For drainage, waste, and vent (DWV) applications, the tube is marked with a yellow stripe. This quick visual cue helps you distinguish DWV tubing from potable-water tubing, which uses other color markings (for example, green, blue, or red stripe codes correspond to different potable-water tube types). Using the correct DWV tube ensures it’s appropriate for waste and venting and meets code requirements, since DWV tubing can have different specifications than drinking-water copper. So, the yellow stripe identifies DWV copper tube.

Copper tubing uses color-coded stripes to show the intended service. For drainage, waste, and vent (DWV) applications, the tube is marked with a yellow stripe. This quick visual cue helps you distinguish DWV tubing from potable-water tubing, which uses other color markings (for example, green, blue, or red stripe codes correspond to different potable-water tube types). Using the correct DWV tube ensures it’s appropriate for waste and venting and meets code requirements, since DWV tubing can have different specifications than drinking-water copper. So, the yellow stripe identifies DWV copper tube.