Burro gas lines - Page 2 - Fiberglass RV


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Old 11-03-2007, 06:40 PM   #15
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There's rubber and there's rubber -- Some may be just plain rubber and some are higher pressure hoses covered in rubber for damage protection (typical LP 'rubber' hoses are the latter type). Take another look at a SCUBA diver's 'rubber' regulator hoses...
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Old 11-03-2007, 07:01 PM   #16
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[b]Each appliance has bendable copper tubing (I wouldn't really call it flexible) from a tee in the iron pipe right under the floor up to the appliance, generally with a shutoff valve along the way. Here, I wouldn't want rubber because I would be concerned about long-term degradation, and iron pipe would not be compliant enough to accommodate the movement of appliance installation or operation.

These choices all seem appropriate to me, and (judging from the CSA approval sticker on the trailer) meet at least Canadian standards. The under-floor and indoor parts are comparable to natural gas installations in houses, which also seems appropriate.
It's the copper lines to the appliances that our Burro didn't have, thus no CSA sticker, until now. BTW the gas certification sticker shows it's a provincial jurisdiction.
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Old 11-03-2007, 10:01 PM   #17
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I replaced the rubber hose to the regulator on mine with the flexible steel gas lines they sell next to the water heaters in Home D.
Felt much better with those than the rubber hose.
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Old 11-03-2007, 10:38 PM   #18
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Greg-I would not be in the habit of moving that flexible metal line around very much. I think that they are meant for easy installation of permenant appliances. I would think that the proper rubber hose from the regulator to the iron pipe would be more durable.
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Old 11-04-2007, 11:00 AM   #19
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BTW the gas certification sticker shows it's a provincial jurisdiction.
Good point. The entire trailer is subject to CSA Z240 (for a Recreational Vehicle - Single Axle Trailer or Slide-In Camper). While I haven't looked it up, I expect that Z240 probably covers the propane installation, among other things, but the propane installation is also covered by provincial regulations (at least where mine was made, in British Columbia) as indicated by the sticker on the front of the body (right above the propane tanks and regulator).

The U.S. equivalent to the CSA in this case is the RVIA; I can only guess that individual provinces and states each have their own rules for the propane system, but generally following national standards.
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Old 11-05-2007, 06:54 AM   #20
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Greg-I would not be in the habit of moving that flexible metal line around very much. I think that they are meant for easy installation of permenant appliances. I would think that the proper rubber hose from the regulator to the iron pipe would be more durable.
Greg, I'm with Bob on this one. Those "flexible" steel hoses are meant to be bent once, in one direction. That stresses the metal, but it's soft enough to accommodate it. Just like bending a piece of wire back and forth, if that stressed point continues to be stressed, either through bending, or potentially vibration and movement, it could fail as well. Copper, while more difficult to work with initially, is a much better choice for RV applications.

Roger
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Old 11-05-2007, 08:38 AM   #21
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I just renewed my old copper lines with .065 wall stainless steel and stainless compression fittings.Clamps I used had nylon inserts to reduce wear on tube when the might rub.I did a soap test when presure checked... something I may do when checking my trailer before outings.

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Old 11-05-2007, 08:50 AM   #22
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... .065 wall stainless steel and stainless compression fittings.
If this is the system I remember, I think it would be great, and capable of handling about 1,000 times the pressure found on the regulated side of a propane system. Of course, I would want to confirm that the specific materials are appropriate for use with propane.
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Old 11-05-2007, 02:04 PM   #23
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For several reasons the paranoia on this escapes me.

What kind of pressure are we talking about? Maybe a half a psi?

What's going to degrade the rubber? Darkness? Moisture?

On my old Scamp the original installation was copper with steel hangers. Guess what the copper looked like after 20 years around the hangers?

I ripped it all out and replaced it with rubber rated for 160 psi and gas/oil. I also installed it so nothing rubs or abrades.

As old as I am, I can guarantee you that by the time I'm finished with this Scamp the rubber will be in better shape than that old corroded green copper.
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Old 11-05-2007, 07:36 PM   #24
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Greg-I would not be in the habit of moving that flexible metal line around very much. I think that they are meant for easy installation of permenant appliances. I would think that the proper rubber hose from the regulator to the iron pipe would be more durable.
They recommend this stuff as the way to bring the gas lines into the house and keep from damaging the gas lines in the event of an earthquake so I would imagine I'm ok. The installation using a 3 foot run of CSST flexible supply line seems much sturdier than what was there previously. I think as with anything, you need to keep an eye to maintenance for whatever type systems you use and replace if you see any indication of wear or damage.
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Old 11-10-2007, 07:12 PM   #25
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If I were to use rubber hose for LP, here's what I would be inclined to use (says it's permeation resistant):

http://abbottrubber.thomasnet.com/viewitem...ne-propane-hose

However, I suspect that the use of metal (iron and copper) tubing in RVs may have something to do with time-resistance to fire. Loren's right about the steel fasteners corroding after time, esp if the compartment was cleaned with bleach...
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