Plumbing stores, in my experience, are not the place either. They rarely, in my experience, know anything that they are willing to state about code requirements. The inspector is by far a better source of this info. Usenet is at least as good as plumbing stores.
Get a gas fitter or at least someone licensed to do it or you could blow up yours and your nieghbors house. As most of the places ban the use of Galvanized pipe with gas type k cooper tube is all we use here and have started to use plastic buriul pipe . WHAT EVER you do don,t use poly as the gas will break it down.
Now that's what I wanted to hear. I already have the anode, from a second hand marine supply place for $7. About 7"x 2" x3/4" of zinc with a wire coming out of the block. I guess I'll go ahead with that project.
Why on earth should attaching an anode to the outside of a gas pipe require a "gas fitter"? And what does that have to do with galvanized pipe, other than being a substitute for the protection provided?
If you use plastic, you have to use a special high density poly that is listed for gas. Suppliers here sell it to licensed plumbers. We have galvanized pipe all over the place for natural gas, particularly on runs across flat roofs. Underground runs that are not done with poly are done with the plastic covered black pipe as mentioned by other posters. The local utility should have a book or pdf available online with regulations for gas piping.
How so? A buried black-iron pipe will last 30 years - an outside grill will be luck to last 30 months. We ran an iron pipe, under salt water, to a gas light at the end of a pier. That was over twenty years ago. The lamp is still on. Of course the pipe is covered with barnacles, so that might protect it some. Still...
How so? Burying the pipe is purely cosmetic - you could run it over the grass and it wouldn't matter.
I had to do it by tomorrow. We are redoing concrete and concrete people will concrete the area tomorrow. I ended up using iron pipes. (which I had to cut and thread in several points).
I coated the iron pipes with a very generous coat of military surplus cosmoline, then wrapped then in closed cell pipe foam insulation, and buried them in river pea gravel. I am on a little hill, so the water table is not even close to the pipe.
I can remember as a kid seeing underground pipes being coated with tar before they were buried. The same treatment was used on oil tanks in the ground.
No, the new pipe will not touch concrete at any point. I specified it and my FIL will be watching. The area where it goes vertically into the ground, and where concrete surrounds it, they will make a round opening that I will fill with something else. That's also why I decided to buy pea gravel to fill the trench, instead of using crushed recycled concrete that they will use under the new cocnrete as "gravel".
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