Mix & Match Gas Pipe

[Charley L. Bottger]

Originally Posted by dvalley

Most jurisdictions do not allow galvanized because of the possibility of the zinc coating flaking off inside the pipe, and clogging orifices and valves.

I have worked on tons of gas lines that have had some galvanized iron pipe installed and have never noticed any flaking of the galvanized within the pipe.

Galvanized pipe is not normally allowed in this state. Plumbers and gas fitter licensed HVAC contractors do not use any thing but black iron. When ever I notice galvanized pipe this tells me that the homeowner has been doing his own plumbing not knowing the difference.

As an inspector I do not write up a few nipples or elbows installed in the system usually just prior to a gas control valve, but if the complete line was galvanized I would have it in the report.

I have to agree with Jeff Pope galvanized iron and black iron are not dissimilar metals