iron gas line needs replacement

[gasline85]

Thanks. Tried to search for info, but perhaps too general to get an answer.

I have a home where I tore out an old deck. There is a steel gas pipe coming from underground by one side of the former deck and it appears to have a green coating on it. It is around 1.5 or 1.75" and runs about 20 ft then turns and goes 4 ft then has an inline valve, then a 'fitting' then an elbow then goes through concrete to the crawl space. I'm thinking the 'fitting' must be some sort of reverse threaded on one side else I'm not sure how one would remove the assembly.

Here is a link to some photos.

https://plus.google.com/110308938275594273789/posts/Nk5AjoHYvki

Just want to do a safe job of replacement prior to deck rebuild. Is really rusty. I have some big pipe wrenches but haven't tackled something like this.

Is there an adapter from steel to some sort of plastic gas pipe that would work? Don't want future corrosion if possible.

Ideas? Thank you!

 

[phishfood]

That is black steel pipe.

Anytime steel gas pipe touches any kind of concrete or masonry material, or even dirt, there is a definite risk of corrosion.

You need a professional to pull permits and get inspections so that the repipe is done correctly. Gas leaks are bad news.

 

[journeyman]

I agree with phishfood i highly recommend letting a professional make repairs. I would not try this on your own. Does your home have propane or natural gas? If you have natural gas black pipe is the wrong pipe anyway. You want to use galvanized for natural gas and black iron for propane

 

[havasu]

In my area, galvanized pipe is prohibited for any gas, and black pipe must be used (but not underground).

 

[plbgbiz]

I agree with phishfood i highly recommend letting a professional make repairs. I would not try this on your own. Does your home have propane or natural gas? If you have natural gas black pipe is the wrong pipe anyway. You want to use galvanized for natural gas and black iron for propane

Not all natural gas is created equal. Just another reason why this is not a DIY project.

 

[journeyman]

I live in southern cali. Galvinized is not allowed in ground but you can still use it. I just did a inch and quarter gas line in galvy and pe pipe. The substance in propane gas that allows you to smell it eats galvy. Just like natural gas substance eats black iron. My work was inspected and passed.

 

[gasline85]

Thanks for the replies. That is about what I suspected. I have seen plumbers doing repairs and replacing with a plastic, stiff but flexible pipe. What sort is this plastic pipe?

 

[journeyman]

It is called pe pipe and needs to be fused there are mechanical fitting but i dont bury fittings like that

 

[gasline85]

Thanks, Journeyman. I saw some youtubes on the fusing process. Are there adapters from 1.75" steel pipe thread to pe? That might be an easier solution than replacing steel - all of it would be above ground.

 

[journeyman]

They do make trasitions to go from steel to pe pipe. Make sure you get the work inspected so you dont have any issues. You have to be certified to install pe pipe