Lots or reasons really. Copper does not rust, and its easier to repair if the pipe does happen to fail. Pex may be a more viable option if this is a DIY project due to cost of copper and skill required to solder connections.
Depends on the applications such as waste, vent ,water supply.
Copper Pipe is no longer used because of cost so many settle for copper tubing or Red Brass pipe 85% copper 15% zinc
A threaded copper fitting on the copper side, male or female, and the galvanized is screwed into it.
If you do connect copper pipe to galvanized pipe, you will need a dielectric coupling or else the galvanized pipe will corrode. Same with connecting galvanized pipe to brass fittings. Brass is an alloy that contains copper and therefore the same electrolytic properties will exist unless a dielectric coupling is used. Hope that helps you out.
Galvanized pipe will be silver/gray color. Copper will be copper. Use a magnet, it'll stick to galvanized pipe but not to copper. Drinking water lines should not be black steel pipe.
Yes
yes
Because you will then get a 'galvanic reaction'.
If you had been advised why ask again?
yes. Copper to Galvanized must have a dielectric fitting to avoid a galvanic reaction causing corrosion and eventual leaks.
You will want to put a length of copper into the fitting and solder it before you put it on the galvanised so that you don't cook out the pipe dope. >>they also could have soldiered on a flange on copper and thread on galvanized pipe.would have been another choice
GI Pipe is "Galvanized Iron" Pipe. These days the pipe will likely be made from steel rather than iron.
There are no hoses that do this. There is only copper pipe, galvanized pipe, or PVC normally use in a home water supply.
No. Galvanized pipe is what they used to use, and now should either be replaced with modern type of water pipe such as PEX or copper. COMMENT: Complete agreement. Galvanized served it's purpose and did bring water into a lot of people's homes for a lot of years. That was then, this is now. Today, it would be a dead last choice for a plumbing system.