Galvanized for water, black for gas. You can always paint the black if you are worried about it rusting.
That would depend on local codes as many do not allow the use of galvanized and other codes state "where moisture is present galvanizing coating shall be applied.
There is no one code that fits all as some codes follow OSHA guide lines when it comes to color coding of piping so painting black is NOT always an option
What is the application as many times such as natural gas it is permissible as gas lines exposed to the elements have to be protected painted / insulated or galvanized piping vanized piping
galvanized piping is acceptable but not necessary. all steel piping must be wrapped when entering ground at least 6" (a foot is better) bushings are not allowed unless properly peened so its better to just use bell reducers. and finally be sure to size your pipe according to the BTU requirement of the appliance being serviced
Galvanized piping is typically made of steel and then coated with a layer of zinc to prevent corrosion. Steel is a ferrous metal, meaning it contains iron. Therefore, galvanized piping is considered a ferrous material due to its steel composition.
Most codes do not allow Galvanized piping/fittings on gas piping. I have used galvanized pipe/fittings on exterior gas piping before in the state of Michigan but other states do not allows this. Check with your local code authorities.
purpleThe color of zinc
Cast Iron is great for drainage and steel piping is good for venting (galvanized , or wrought iron or yalloy ) for venting
old galvanized piping
Depends on the water quality and what type of galvanized piping was used
Galvanized piping or painted depending on local codes and type of fuel (gas) NO drip legs where the piping is subject to freeze ups
Yes. Use a threaded fitting, male or female as needed on the copper and screw the galvanized into it.You must use a dielectric fitting to connect copper to galvanized pipe. If you don't, a galvanic reaction will occur and the piping will corrode and leak. You can use a Dielectric Union or a Threaded Brass fitting to join the two types of piping together.UNIONS can leak the best answer would have been a dielectric nipple
Two wrenches one to loosen and one to hold back
Depends on local codes I use Galvanized piping and fitting when I know the piping is going to be exposed to moisture (dampness) or the elements