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Old 07-22-2014, 03:29 PM   #1
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LP vs Propane

Ok, don't flame me too bad. I tried searching google and here on the forum in the general discussion and general tech and repair section, a lot of threads were returned but I didn't see one specifically for what I'm wondering.

I use LP gas at home for my furnace. Can that be used as a supply for my TT furnace, range and water heater?

Is there a sticky somewhere here that denotes the differences between the two?

I do know that natural and LP do not contain the same energy per ft3.
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Old 07-22-2014, 03:44 PM   #2
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They are the same thing, so I don't why not keeping in mind regulated pressures feeding your appliance.
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Old 07-22-2014, 03:55 PM   #3
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Same difference. The Brits say petrol, we say gasoline . The official term is 'Liquefied Petroleum Gas', if you're bored there is the explanation on Wikipedia Liquefied petroleum gas - Wikipedia, the free encyclopedia
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Old 07-22-2014, 04:27 PM   #4
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Originally Posted by 53jimc View Post
Ok, don't flame me too bad. I tried searching google and here on the forum in the general discussion and general tech and repair section, a lot of threads were returned but I didn't see one specifically for what I'm wondering.

I use LP gas at home for my furnace. Can that be used as a supply for my TT furnace, range and water heater?

Is there a sticky somewhere here that denotes the differences between the two?

I do know that natural and LP do not contain the same energy per ft3.
LP denotes Liquefied Petroleum which includes Propane and Butane. Butane has a higher vaporization temperature and is not used up north where the temps are much lower. Propane has a much lower vaporization temp and is used in the north and is more generally used for heating, cooking, etc. Your LP you use at home is what is generally used in rvs.
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Old 07-22-2014, 10:01 PM   #5
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Thanks all. Googling it wasn't so clear.
So, potentially I could use my big tank to fill my small tanks.... Hmmmm need adapters, scales....
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Old 07-22-2014, 11:07 PM   #6
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Thanks all. Googling it wasn't so clear.
So, potentially I could use my big tank to fill my small tanks.... Hmmmm need adapters, scales....
Pssst, and probably a license and ..., it might be illegal where you are or the bulk dealer might remove your tank?
Don't speak out loud what you're thinking, but you're on the right track .
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Old 07-22-2014, 11:18 PM   #7
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LP denotes Liquefied Petroleum which includes Propane and Butane. Butane has a higher vaporization temperature and is not used up north where the temps are much lower. Propane has a much lower vaporization temp and is used in the north and is more generally used for heating, cooking, etc. Your LP you use at home is what is generally used in rvs.
You are 100% correct but Butane is the fuel used in cigarette lighters and the higher vaporization temp. is the reason why a winter emergency kit should include matches and not a lighter, it wouldn't do any good in 40 below weather.
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Old 07-22-2014, 11:29 PM   #8
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Camping World sells a "refill propane adapter" that you can use to refill the little 1# bottles from a 20# cylinder. It involves freezing the little bottle, then attaching it to the 20# one, turning it upside down, and opening the valve on the 20. Also makes it against federal law to transport the small cylinder afterwards, although I doubt they'd be setting up any roadblocks for you.

Not sure how you'd fill anything larger (like the 20 or 30# tanks) from a bigger one. Beyond my skill level...
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Old 07-23-2014, 12:01 AM   #9
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To fill your larger tanks (20's and up) you have to have a "wet" line installed on the bigger tank. If you were to try to fill it from the top of the bigger tank all you would get would be the gas not the liquid. It stays liquid under pressure that's why they say to never fill a tank above 80%. It leaves room for the gas expansion! You will have to get with the supplier of the bigger tank to see if they can install a wet line or not.


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Old 07-23-2014, 08:09 AM   #10
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Good discussion, thanks everyone.
I'm betting my gas company would not install a wet line, but I'm sure they'd fill my tanks when they come out to fill the big one.
I need to find a suitable place and get them filled now anyway. I didn't realize my fridge was on auto so it ate my gas. Newbie mistake,lol.
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