I am attaching a brass fitting to the threads of black pipe in a natural gas application in order to get to the flex line to the appliance. Or is it better to use the stainless steel, or whatever material it is that comes with the gas connection kits? This is an outdoor application, so I thought brass would hold up longer, but I'm not sure about the dissimilar metals factor?
There could be an issue with dissimilar metals and Galvanic corrosion. Indoors since water isn't going to get into threads in a gas connection, it's not an issue, but outdoors it may be a different story.
I'm not a qualified gas plumber/fitter, so I'm not going to advise you.
You could post on one of the several plumbers forums and they might be able to advise you, but will probably refer you to a professional.
Updated on July 7, 2018
By Eugene Brennan