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Copper pipes are marked with red or blue lines sometimes to show that they are type L or type M (type L is bendable, type M is rigid and has thinner walls). Some plumbers I have seen use red paint markers for marking cuts, others use pencils or other colors of paint markers, and I've even seen china pencils used. The paint markers I've seen are similar to the ones machinists use, they tend not to wash or wipe away easily.
What else can I help you with?
Are copper pipes the best?
Copper pipes will last the longest. anonymous@oola.com
Why is copper used for water pipes?
Copper is used as hot water pipes because the copper will not corrode when the hot water goes through the pipes
Why is copper used for hot water pipes?
Copper is used as hot water pipes because the copper will not corrode when the hot water goes through the pipes
What is the Composition of copper pipes?
Copper 99%
Are copper pipes a compound?
No, copper is a metallic element.
When should you use joint compound on copper pipes?
=== === By the way I doubt very seriously your using copper pipes your using copper TUBING
What are examples of materials improved by technology?
steel, copper, bronze, pewter, roofing, pipes, plastics, tires, asphalt, ceramincs, glass, printing ink, toner, lipstick, mascara ...............
Which elements are used to make water pipes?
Copper pipes are now most commonly used in plumbing. Lead pipes were used long ago, and the word plumbing is derived from the Latin word for lead (plumbum). Iron pipes were used until relatively inexpensive copper pipes became readily available during the twentieth century.
Are copper pipes heat resistant?
no
What is the metal for water pipes?
Copper
What metal is used for the pipes used in central heating?
Used to be copper, now most new systems are red PEX.
What chemical reactions will happen if you connect galvinized copper and brass metal pipes?
There is no chemical reaction that will happen if galvanized pipes are connected to copper pipes via a brass intermediary. The reason is that brass does not react to either copper or zinc, the mineral used to galvanize metal pipes.
