Capping Refrigerator LPG Tubing

[Hector517]

I replaced the dual source Dometic refrigerator in my 2015 MicroLite 21FBRS with an electric residential refrigerator. I tried capping the LPG copper tubing that was connected to the original refrigerator with a commercial sealant and copper cap, but the CO/LPG Safe-T alarm frequently goes on and my LPG tanks are going empty with very little stove top use. I suspect leakage from the LPG tubing. Does anyone have any suggestions on how to properly and permanently cap the LPG copper tube? Thanks!

[Bama Rambler]

The fitting on the propane line is a flare fitting. In order to seal it correctly you need a flare plug. Also, you don't need any sealant on it. The flare will seal metal to metal.

[5picker]

It will look like this.

[bob caldwell]

Hydraulic hose store, if you can't find elsewhere

[Hector517]

Thanks, fellas! What size flare plug should I ask for at the plumbing store?

[5picker]

We don't know what size supply line ran to your refrigerator?

Most RV's supply the refrigerators with 3/8" copper line at the refrigerator connection fitting. Fittings are sized by the O.D of the supply line. If it was plumbed with a flex hose, you will have to do some detective work.

[Bama Rambler]

I think the fridge line is 3/8"

[bob caldwell]

Can take a bolt that you think you can screw in, BUT DON'T, and get close to size...

[Photo Lab]

Right on all of the above!
You can get the plugs at nearly any hardware store. It would be a "3/8" SAE flare plug"
No sealant of any kind is needed, and I must caution that run of the mill pipe sealant will not hold propane. The plug will seal best without any sort of sealant.

[Hector517]

The secret to success is to surround yourself with people much smarter than you. I screwed on a 3/8" flare plug to the fridge line and turned on the LPG tank. The Safe-T sensor is silent. I am a happy guy. Thanks everyone.