What is the difference between red and blue copper pipe other than the blue cost twice as much?
Question:At home depot they have red and blue copper piping the blue cost twice as much as the red. The only visual difference I can see between the two is the blue looks more polished
Answers:
Red markings are Type M copper. It is the thinnest walled copper pipe. Blue is Type L copper. It is thicker and used in most house plumbing. There is also Orange marked pipe which is Type K and is normally used for water service lines underground and is the thickest copper.
Well, red could mean hot, and well blue could mean cold
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