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Old 03-07-2010, 06:01 PM   #1
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Exclamation Under trailer propane lines

While under the Trade Wind, I noticed that the propane lines have a couple issues. First, at the front end where it goes under the camper from the tanks, the line has been compressed. Everything works and I don't know if this is a safety issue or not. Second, one of the Junctions between two pieces is the wrong kind and needs repaired for sure.

I have to move the line some to install the new Bal stabilizers, so I am wondering if the smart money isn't to completely replace the main line.

If the answer to that is yes, what size tubing and of what type should I get? What is the best way to protect them against road rash in the future? Oh yeah, what is the proper size line coming off the main line to individual appliances?
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Old 03-07-2010, 08:02 PM   #2
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I am surprised people are being timid about weighing in on this one.
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Old 03-07-2010, 08:08 PM   #3
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Rodney,

On my Liner, I used 1/2" type L soft (under slab) copper for the main line. No branches since all appliances are on the same side. Up through the floor with the supply for the appliance. I used pipe insulation for protection of the soft copper.

Hope this helps.

Bill
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Old 03-07-2010, 08:38 PM   #4
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On my 75 TW the main line is 5/8" and the branches are 3/8". I do not have any protection on my lines and they have held up well for 35 years. I also do not travel as many forest roads as you do.
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Old 03-07-2010, 08:42 PM   #5
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To protect the lines, you can use rubber garden hose in a diameter to fit over the tubing. Cut it along its length in a spiral fashion (helps prevent the hose from working its way off the propane line) and fit it over the propane line.
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Old 03-07-2010, 09:26 PM   #6
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Rodney,

On my Liner, I used 1/2" type L soft (under slab) copper for the main line. No branches since all appliances are on the same side. Up through the floor with the supply for the appliance. I used pipe insulation for protection of the soft copper.

Hope this helps.

Bill
Protecting the copper gas line is a bad idea. If there is a leak, it will help pool the gas.
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Old 03-07-2010, 09:31 PM   #7
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Aren't we talking about protecting the lines that are on the underside of the coach?
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Old 03-07-2010, 09:36 PM   #8
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Aren't we talking about protecting the lines that are on the underside of the coach?
Yes and that is why they are under the coach. If they leak the gas dispurses. It is also bare so you can inspect them for corrision.
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Old 03-07-2010, 09:37 PM   #9
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Protecting the copper gas line is a bad idea. If there is a leak, it will help pool the gas.
I realize that I have an accountants mind, but I am not sure where the gas would pool in a 1/2" pipe insulation. I am sure that you could put the split to the bottom and since propane is heavier than air, it would settle out into the atmosphere. My 1979 Safari has something similar to the pipe insulation. In addition, the insulation gives one something to attach the straps holding the line against the belly pan without the possibility of chaffing.

Bill
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Old 03-07-2010, 09:57 PM   #10
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in 24yrs I've never had a problem with uncovered lines.
Just something else to remove for inspection.

Be aware that there is always the possibility of damaging a line and not being able to see it because of a garden hoser...
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Old 03-07-2010, 10:09 PM   #11
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I just finished replacing the lines on the Bambi today. I used half inch copper for the main and three eights for the three branches. Under the trailer I slid plastic ( the black stuff with the split along its length, used for wrapping electical wires) it looks great and it protects with no danger of gas buildup.
Tim
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Old 03-08-2010, 01:57 AM   #12
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Our Tradewind's lines are also somewhat crimped along the underside of the tongue; clearly someone put a jack or jack stand under there at one point.

That's one spot that could use a little protection. or the copper pipe run along the inside face of the tongue rather than the bottom.

One nice way of protecting the line would be to cut some 1 & 1/4" pipe lengthwise and weld it open side up to the underside of the tongue; this would provide a crush proof runway for the copper tube.

Alternatively, two lengths of 3/4" x 1/4" welded on edge would also work, but would not be as strong.

- Bart
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Old 03-08-2010, 08:28 AM   #13
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I realize that I have an accountants mind, but I am not sure where the gas would pool in a 1/2" pipe insulation. I am sure that you could put the split to the bottom and since propane is heavier than air, it would settle out into the atmosphere. My 1979 Safari has something similar to the pipe insulation. In addition, the insulation gives one something to attach the straps holding the line against the belly pan without the possibility of chaffing.

Bill
Remove the insulation and install cushioned Adel clamps. The insulation will increase corrosion since it traps water.
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Old 03-08-2010, 08:53 AM   #14
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Black pipe is also code for propane
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