Propane Pigtail Won't Unscrew

[TaftCoach]

I noticed I had a leak on one side of my regulator and plan to replace the hoses. I went today to unscrew the hose and it won't budge. I was worried I would round off the nut with the adjustable wrench I had available. (The other side unscrews easily.) I also noticed a greenish tint around that area that I assume is from escaping propane.

I'm planning on going back with a box end wrench and some penetrating oil.

I assume someone here has "been there done that" and may have some good counsel.

[GHen]

Hmm, I’m trying to remember if the old tanks are reverse threads or the news ones are. Just for giggles, try the other direction….

[TaftCoach]

That's why I tried the other side. It wasn't budging in either direction.

[JFlightRisk]

The threads shouldn't be reverse, at least they weren't on ours. If the old hose end threads into the casting, it'll be a tapered NPT, and may have been overtightened when assembled. If it looks like there's a brass fitting into the regulator, and the hoses screw into that, the hose fitting will be inverted flare, and straight threads.

A flare nut wrench is ideal, otherwise a tight-fitting combination wrench should break it loose.

[TaftCoach]

Originally Posted by JFlightRisk

The threads shouldn't be reverse, at least they weren't on ours. If the old hose end threads into the casting, it'll be a tapered NPT, and may have been overtightened when assembled. If it looks like there's a brass fitting into the regulator, and the hoses screw into that, the hose fitting will be inverted flare, and straight threads.

A flare nut wrench is ideal, otherwise a tight-fitting combination wrench should break it loose.

The green staining makes me wonder if there is some metal to metal reaction that happened to cause it to seize.

[PaulB12]

Vise gripes would work and would not do to much damage.
If it does and you still can't get it off it was ruined to begin with.
PaulB12

[Vicr]

Originally Posted by PaulB12

Vise gripes would work and would not do to much damage.
If it does and you still can't get it off it was ruined to begin with.
PaulB12

As a professional with more tools than most guys have and the knowledge how to use them all Vice Grips are the worst tool to use. As the OP stated he's going to go back with a box wrench which is the correct tool for the job.

[travelingjw]

Might just put a few drops of acetone on the green area. If it melts someone used a Permatex glue like the ones used to hold gaskets on. Saw this more than a few times while working at a Radiator shop. People think that by sealing the threads they will stop any leaks.