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Old 05-16-2006, 10:49 AM   #1
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Proper gas line for new furnace ?

I am about to replace the furnace in my Globetrotter with an Olympyian Wave six . In doing the hookup do I need to use all copper line for the installation or is it ok to use low pressure LP line ( rubber) from a shut off to the furnace furnace connection. The rubber line would be inside the trailer.

I don't have a problem doing flared fittings but the rubber line would sure be easier.
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Old 05-16-2006, 12:45 PM   #2
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That's what they are doing in boats and you know how the Coast Guard is about stuff that goes boom. I've been considering the same for the new ridge and range. It's getting the bends right that drives me nuts. Do you have an online source for made up lengths?
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Old 05-16-2006, 04:28 PM   #3
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I have yet to see a furnace that was NOT plumbed in copper only! I think that the heat would be an issue for rubber tubing. Even in large MoHo's, they run the majority of the LP line in black pipe and then the last several feet in copper.

If you notice, all wiring in a furnace is done in a special '105*C' heat resistant wire also. The bends are not difficult if you get a tubing bender. They are not expensive and are worth their weight!!! Don't forget the double flares that are now required in the RV industry, no thread sealant and don't over-tighten hose flair fittings.

Your mother is done with her lecture now and you kids can go out and play .
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Old 05-16-2006, 08:46 PM   #4
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Flared for for me

Guess I'll go with flared copper. Another chance to use the $45 Rigid tool I bought to do the last job.
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Old 05-16-2006, 09:43 PM   #5
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I never heard of a double flare. How does one do a double flare?

Thanks,

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Old 05-17-2006, 08:24 AM   #6
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Quote:
Originally Posted by silver 67
I never heard of a double flare. How does one do a double flare?

Thanks,

Silver 67
It involves folding an inner lip into the flare to provide a second layer of metal against the fitting. They do take a bit of practice to get right, but a few feet of scrap copper tubing and an hour or so and you'll be hitting them every time! There was an excellent description with photos in a thread a few months ago. Try the search function for 'double flare' and you should find it.
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