How do you run soft copper gas line through tight bends?

Use pipe dope rated for gas(I think code calls for it to be rated for LP gas even if it's for a natural line.

On soft copper use flare fittings only, no compression or sharkbites, a drop or two of oil on the threads and on the back of the flare(where the nut contacts the flare) will allow for proper tighting(FWIW I have been known to use a small dab of pipe dope for this, it's not to seal it just to lubricate).

Test it when it is complete, either air test it with it disconnected from the appliance or soap it when it's complete and hooked up, I prefer to air test if it's a bunch of line or fittings, if it's one or two fittings at the ends I'll just soap bubble it.

Where it goes though the top/bottom plate use the biggest nail plates that You can reasonably use.


For the guys worried about hitting the line with a nail think about how many feet of wire and water pipe runs through the walls and hardly ever gets hit, with some reasonable care as to where it is located a copper gas line is in no more danger.

I've seen Mr N's work on other forums and have absolutely no reason to believe he will have any problems with this job, I think he just wanted to make sure he didn't go about it the hard way when there was a much easier alternative.

Thanks for the post Mike007 & Brewchief

I've bent shorter section (about 10') by filling it with dry sand. Packed it good and plugged both ends. It took some time to get the sand out afterwards, but it worked with a lots of tapping and some wire to help break the compacted sand. In your case the tube is way too long...

If you need to make a lot of bends, using PEX plastic water supply line might be an option.

Tammi6523 you might want to re-read your title and post, then edit.