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 > REFILL 1LB, lp BOTTLE ?

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Oasisbob

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Posted: 12/04/20 11:08am Link  |  Quote  |  Print  |  Notify Moderator

If I fill f one pound LP bottles off my 20 pounder will the drolp in pressure, due to volume increase be a concern? I do use metal sealed caps as a safety precaution. Anyone know the pressure of standard LP bottles/ Seems after filling a few the bigger bottle loses some pressure. Thanks,


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Posted: 12/04/20 11:12am Link  |  Quote  |  Print  |  Notify Moderator

There are a number of how to videos on YouTube. I have not had much luck, but my DSL does it all the time. I have a small 5 lb (?) refillable tank that I connect with a hose to my portable devices.


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Posted: 12/04/20 12:45pm Link  |  Quote  |  Print  |  Notify Moderator

Have done it for years, and yes occasionaly a bottle will leak from the safety valve. By design thesebottles have a limited life expectancy.
I use a 5 gallon bucket as a holder when filling,
[image]
I have a gallon or so of water in the bucket to help stabilize it.
Leaving it upright will give you 1 lb bottles with only about 1/4 lb of propane. Inverting allows liquid product to be transferred.

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Posted: 12/04/20 12:50pm Link  |  Quote  |  Print  |  Notify Moderator

wanderingaimlessly wrote:

Have done it for years, and yes occasionaly a bottle will leak from the safety valve. By design thesebottles have a limited life expectancy.
I use a 5 gallon bucket as a holder when filling,
[image]
I have a gallon or so of water in the bucket to help stabilize it.
Leaving it upright will give you 1 lb bottles with only about 1/4 lb of propane. Inverting allows liquid product to be transferred.


Use this method and put the small bottle in the freezer over night before filling. The cold helps get more liquid in, with the large bottle upside down it liquid transferring.


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Posted: 12/04/20 12:51pm Link  |  Quote  |  Print  |  Notify Moderator

I would invest in this:

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DrewE

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Posted: 12/04/20 02:34pm Link  |  Quote  |  Print  |  Notify Moderator

Oasisbob wrote:

If I fill f one pound LP bottles off my 20 pounder will the drolp in pressure, due to volume increase be a concern? I do use metal sealed caps as a safety precaution. Anyone know the pressure of standard LP bottles/ Seems after filling a few the bigger bottle loses some pressure. Thanks,


The pressure in the 20 lb cylinder (and the 1 lb cylinder, for that matter) do not depend on the amount of propane in it, since the propane is in liquid form and the pressure is the vapor pressure of the propane. It does depend on the temperature of the propane in the container.





Oasisbob

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Posted: 12/04/20 03:54pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks all. You guys are so smart. I learned a few things here.

missnmountains

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Posted: 12/04/20 06:20pm Link  |  Quote  |  Print  |  Notify Moderator

We have been doing this for years. Put the one pound in the freezer over night. Using the adapter attach the frozen one pound to the 20 pound. Invert the 20 pound and open the valve. One pound will fill. Close the valve on the twenty pound and remove one pound.

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Sjm9911

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Posted: 12/04/20 06:47pm Link  |  Quote  |  Print  |  Notify Moderator

I was going to try that, but just take the 20 lb with me. Easier and i can hook a few things up to it. So, fire pit, grill, griddle. And no worries on changing tanks while im set up. I do bring 1 small bottle incase.


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theoldwizard1

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Posted: 12/04/20 07:03pm Link  |  Quote  |  Print  |  Notify Moderator

DrewE wrote:

The pressure in the 20 lb cylinder (and the 1 lb cylinder, for that matter) do not depend on the amount of propane in it, since the propane is in liquid form and the pressure is the vapor pressure of the propane. It does depend on the temperature of the propane in the container.


missnmountains wrote:

We have been doing this for years. Put the one pound in the freezer over night. Using the adapter attach the frozen one pound to the 20 pound. Invert the 20 pound and open the valve. One pound will fill. Close the valve on the twenty pound and remove one pound.


Both statements are 100% correct !

Keeping the 1 lb tank in an ice bath during the transfer works as well as freezing it.

Pouring boiling water over the 20lb tank, or leave it sit in direct sun for a couple of hours on a warm day, will raised the pressure in that tank.

You only need about 10F difference to make the vapor move from one tank to the other. Inverting the 20lb tank doesn't really help.

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