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Old 10-27-2021, 08:11 AM   #1
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1973 23' Safari
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LP Line protection entering belly pan

What is the black tubing covering the LP line as it goes into the bellypan? I can't seem to find a replacement for it. Does anyone recommend a modern product for this?

Thanks
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Old 10-27-2021, 08:15 AM   #2
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I've used a split length of rubber fuel line for things like this in the past. For larger tubing, smaller diameter heater hose works, but this looks like fuel line would be a better fit.

Usually I've split the rubber fuel line in a straight line down the length, but in a case like this where there is a bend sometimes I've split it in a slow spiral so that it bend better. Add a few zip ties to hold it in place and a bit of new caulking and you're all set.
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Old 10-27-2021, 08:44 AM   #3
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Looks like the insulation used on hot water lines or A/C lines. Lowes and Home Depot carry it in the plumbing department. I think it comes in a couple different diameters, about 6' lengths I think. It's split lengthwise.
Here are two of them. The top one has a pull away strip to allow the stick-um to seal it back to the tube. Make sure you've got it the way you want it before you pull the strip off. Once it touches the rubber it won't let go except to tear off a piece of the rubber. The bottom one would need tape or zip ties to keep it in place.

https://www.lowes.com/pd/Frost-King-...lation/3132299
https://www.lowes.com/pd/Frost-King-...ion/1001277248

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Old 10-27-2021, 09:54 AM   #4
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Excellent, thanks.
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Old 10-27-2021, 10:18 AM   #5
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So if you do this, aren't you containing potential leaks? How about clear tubing, and as short as possible - to protect impact points and entry points only?
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Old 10-27-2021, 10:24 AM   #6
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The newer units use PEX tubing to protect gas lines. It’s super tough and will resist rock damage far better than foam insulation. Use 1/2-inch PEX for the gas lines on the Airstream. PEX can be split with a razor knife and slipped over the gas lines, then held in place with wire ties or small hose clamps.
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Old 10-27-2021, 12:05 PM   #7
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Grommet

I would just use a grommet to protect it. Make the bend 90 degree's. I don't know why you would want/need to 'angle' a gas line like that.
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Old 10-27-2021, 01:54 PM   #8
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Originally Posted by Trons4u View Post
I would just use a grommet to protect it. Make the bend 90 degree's. I don't know why you would want/need to 'angle' a gas line like that.
Grommets slip and move around. There is nothing wrong with using a short length of rubber or pex tubing to protect the copper gas line. It won't trap any leaks - they would still be quite noticeable.

My coach has many fuel and water lines protected like this from the factory. They used a rubber impregnated canvas to do this at the factory in 1974, but when the shop works on those lines it's replaced with rubber tuning.

The goal is simply to move the rub point from the copper line to the rubber. When the rubber starts to wear it gets replaced.
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Old 10-27-2021, 03:23 PM   #9
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LP hose

This is what is used on my 2021 FC.

I guess you might have to re run all the lines though since it is a bit different.


https://www.flextechhose.com/1-2in-h...-lpg-hose.html
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Old 10-27-2021, 04:41 PM   #10
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We just used 3/4” water hose. But did not cover the joints or valves. Strapped the hose to the bottom of the belly pan. Works fine for us. Good luck
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Old 10-28-2021, 11:39 PM   #11
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Thanks everyone! I appreciate the input!
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Old 11-03-2021, 06:51 PM   #12
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Quote:
Originally Posted by Wetfeet View Post
The newer units use PEX tubing to protect gas lines. It’s super tough and will resist rock damage far better than foam insulation. Use 1/2-inch PEX for the gas lines on the Airstream. PEX can be split with a razor knife and slipped over the gas lines, then held in place with wire ties or small hose clamps.
I am replacing the gas lines in my '54 Safari using 1/2" PEX from the belly pan entry up through the plywood floor as a protective sleeve.

I do not plan to encase the entire gas line. If a leak occurs in an encased pipe the gas can travel within the casing and possibly enter the interior of the RV.
Leaks should be free to vent away.
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Old 11-03-2021, 07:20 PM   #13
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Originally Posted by fiftysafari View Post
I am replacing the gas lines in my '54 Safari using 1/2" PEX from the belly pan entry up through the plywood floor as a protective sleeve.

I do not plan to encase the entire gas line. If a leak occurs in an encased pipe the gas can travel within the casing and possibly enter the interior of the RV.
Leaks should be free to vent away.
The plywood will certainly be better than the sheet metal, but I'm not sure it will accomplish the same thing as wrapping the copper with something.

When a protective layer like a piece of PEX tube is put over the copper line it moves the rub point from the copper to the PEX. The PEX will move with the copper and any abrasion will occur between the wood and/or sheet metal and the PEX. With the setup you're describing, you'll still have abrasion between the copper and something, it's just you've reduced the abrasion from metal to wood.
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Old 11-03-2021, 09:07 PM   #14
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Originally Posted by richard5933 View Post
The plywood will certainly be better than the sheet metal, but I'm not sure it will accomplish the same thing as wrapping the copper with something.

When a protective layer like a piece of PEX tube is put over the copper line it moves the rub point from the copper to the PEX. The PEX will move with the copper and any abrasion will occur between the wood and/or sheet metal and the PEX. With the setup you're describing, you'll still have abrasion between the copper and something, it's just you've reduced the abrasion from metal to wood.
I may not have been clear.
My lp gas line will be encased in PEX tubing from where the tubing enters the belly pan up through the flooring to protect the tubing from rubbing the belly pan or the flooring. Abrasion cannot be entirely eliminated but the PEX will protect the copper tube.
Cheers!
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Old 11-03-2021, 09:13 PM   #15
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Originally Posted by fiftysafari View Post
I may not have been clear.
My lp gas line will be encased in PEX tubing from where the tubing enters the belly pan up through the flooring to protect the tubing from rubbing the belly pan or the flooring. Abrasion cannot be entirely eliminated but the PEX will protect the copper tube.
Cheers!
Makes sense. Thanks.
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Old 11-03-2021, 10:13 PM   #16
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A piece of old garden or lawn hose, cut and put around line, held with zip ties works very well also.
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Old 11-04-2021, 07:31 AM   #17
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Originally Posted by Bubba L View Post
We just used 3/4” water hose. But did not cover the joints or valves. Strapped the hose to the bottom of the belly pan. Works fine for us. Good luck
YEP...MacGyver approved. Did the same on our first AS.

Bob
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