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-   -   Small Propane bottle to/from RV Propane tank. (https://www.thorforums.com/forums/f27/small-propane-bottle-rv-propane-tank-19016.html)

Diemaster 09-09-2019 06:12 AM

Small Propane bottle to/from RV Propane tank.
 
I got about 8 to 10 of the small propane bottles; the ones about 1/2 the size of a 2 litter soda bottle. Some are full but most are between 1/4 and 3/4 full. Is there a adapter hose or fitting or other device I can use to fill and/or empty the small bottles from/into the main propane tank on the RV? perhaps though the Grill connection?

i'd like to carry 1 or 2 for spare (for.ex. if there is a leak in the big system.) and outdoor use like a heater or lantern.

Sweetbriar 09-09-2019 09:54 AM

From the permanently mount RV tank? No. Both the big tank and your portable bottles are filled with liquid propane that boils off as a gas that you burn. No way to get liquid out of the RV tank, easily, to refill the portable cans. I've heard of using a 20 lbs barbecue tank flipped upside down to refill portables but haven't had a need to attempt.

gmc 09-09-2019 10:26 AM

Quote:

Originally Posted by Diemaster (Post 201955)
I got about 8 to 10 of the small propane bottles; the ones about 1/2 the size of a 2 litter soda bottle. Some are full but most are between 1/4 and 3/4 full. Is there a adapter hose or fitting or other device I can use to fill and/or empty the small bottles from/into the main propane tank on the RV? perhaps though the Grill connection?



i'd like to carry 1 or 2 for spare (for.ex. if there is a leak in the big system.) and outdoor use like a heater or lantern.


No way to transfer the propane between tanks, but you can add a device like Extend-a-Stay between the RV tank and regulator that will allow you to connect a portable tank to the RV (main tank stays off while using).
Iíve used this on long trips to run the RV off 20lb bottles... Also provides a high pressure connection to run a grill or other appliance. Appliance must have a regulator in this setup.

10scDust 09-09-2019 12:54 PM

Quote:

Originally Posted by Sweetbriar (Post 201962)
From the permanently mount RV tank? No. Both the big tank and your portable bottles are filled with liquid propane that boils off as a gas that you burn. No way to get liquid out of the RV tank, easily, to refill the portable cans. I've heard of using a 20 lbs barbecue tank flipped upside down to refill portables but haven't had a need to attempt.

I have done this.
With the appropriate adapter in place connecting the small tank to the 20 lb tank, first you put the one being filled and to be put in the freezer for a half hour to an hour.
Then the 20 lb tank needs to be more than half full.
Yes, turn it upside down before opening the valve, and fill in this position.
Beware, the shrader valve in those little green bottles will eventually go bad.
Then they leak!
Happened to me too many times, now I have an adapter for the 20 lb tank to run my grill, or stove top, that those small bottles connect to.

As for on the rig:
I believe it is better to have the connection, inline on the rig, between rig's tank and regulator, then use a 20 lb tank hooked up with the rig's tank shut off tight.

Save the re-filling to the professionals.

MJC62 09-09-2019 01:57 PM

I have not heard of transferring the 1 lb bottles to a larger tank. As stated there is an adapter to hook a 20 - 40 lb bottle to the Rv. As far as filling the 1 lb bottles I have been doing it for years. Freeze the empties and have the 20 lb tank at room temperature attach bottle invert 20 lb tank, open valve and fill til you canít here gas going into small bottle. Close valve on 20 lb tank, invert and unscrew the 1 lbr . Easy peasy. The adapter to fill from the 20 lb tank cost me around $20. The small bottles on average cost about $4. At todayís average price for propane thereís about 80 cents worth of propane in a 1 lb bottle. The only issue I have had with refilling is I have only been able to get a 1 lb bottle about 3/4 full. Some guys use a needle nose to pull open the relief valve on top of the 1 lb bottle get a complete fill I just carry a could extra bottles as that is more messing around than I care to do. After 3 - 4 fills though the valve on top of the small bottles may start to seep time to recycle that bottle. As most folks throw the 1 lbrs away there is never a shortage of bottles available to refill. If you use a propane lantern, portable heater, table top grill or stove refilling is the way to go.


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