Step 1: Parts Needed
Rg6 compression fittings, f-type coupler (barrel), rg6 interior cable (not flooded!), wire cutters, compression tool, punch or #1 Philips screwdriver, hammer.
Step 2: Strip Wire
Wring one of the ends of the rg6 down to the copper and remove the jacket and braid. Hold onto the copper stinger and work the rest of the outer jacket away from the inside. The longer the piece of cable, the harder this will be and longer it will take. You have to run your hand all the way down the cable while pulling. Your end result should be an empty piece of tubing.
Step 3: Add Fittings
You can now slide your compression fittings onto the ends of the cable. Make sure they are seated all the way and crimp them down with your compression tool.
Step 4: Prep Coupler
You will need to remove the guts from the f-type coupler. To do this, locate the side that is not solid. It should have a ring around it. Face this side down and clamp it in a vice or in between your side cutters like I did. Take a punch, screwdriver, or drill bit and hammer down on the top. This should release the insides leaving you with a hollow coupler.
Step 5: Connect Everything and Let It Flow
You can now configure this however you need to get the job done. I used mine to transport hho gas from container to container. You can use couplers with a retaining nut on the back side to hold them tight inside of containers. I have not pressure tested this, but I imagine it won't hold much. I just use it for free-flowing and gravity-fed applications. Enjoy!