Galvanized fittings on black pipe?

Question

Is there any reason to not use galvanized fittings with black pipe. The availability seams better.

Answer 1

There is no reason you can't use galvanised firring with black pipe. Just make sure you use teflon tape at all the joints so you have no leaks. One will not effect the other. If it's for watter, black pipe should not be used though.

Answer 2

Use the same type fittings as the pipe. Do not use galvanized on a gas line unless you check with your local code department first. It is not code in most areas although some do allow it. Selling the house in the future is another reason not to mix. If a Home Inspector sees it and it is against code, you will be required to tear the piping apart and change it before selling. Easier to do it right the first time.

Answer 3

Ok just to confuse things further.
Had similar problem w/ rerouting gas lines in basement of beach cottage.
Always thought galvanized was never used w/ black iron .
Turns out even the utility co. uses galvanized pipe & fittings to replace & mate up to black iron because of the salt air corrosion.
Used the yellow teflon tape on joints as recommended.
The thinking was that you would get bi-metal corrosion because of the zinc coating on galvanized in contact w/ the iron.
We'll all be dead before the pipes give way.

Answer 4

Wrap the threads 4-5 times with teflon tape in a clockwise direction. Then apply a small amount of pipe dope all the way around the thread. If you do it this way you should get a good seal if it is hand tight. Overtightning wont cause it to leak unless you crack the fitting. You just want them to be good and snug. The threads hold the pipe in the fitting. the pipe dope and teflon will seal the gaps between the threads to seal the joint.

Answer 5

Galvanized pipe is used for water type jobs black pipe is for use when doing gas type jobs, because galv will flake and plug up gas lines....

Answer 6

Some good answers. I will add my pennyworth. Don't attempt to use other metals in contact with the pipe i,e copper, brass especially in damp locations because of corrosion created by the electric generated by the dissimilar metals

Answer 7

You should use black fittings with black pipe. If you are using this as a gas supply line. Galvanized
pipe or fittings will corrode quicker with natural gas.

Answer 8

If its for gas you will no problem, the "don't" use galvanised for gas was many years ago when the galvanised would flake of causing problems but now its not a problem and is advised when piping is outside in the elements.

Answer 9

agreed but the reason is , the black pipe is for gas only ,
cant cross them ever