GASPRO Propane Refill Adapter, Fill 1 Pound Bottles from 20lb Tank, Easy to Use, Solid Brass

4.6 4.6 out of 5 stars | 8,294 ratings

Price: 7.17

Last update: 01-26-2025


About this item

Money Saver: Propane refill adapter for 1 lb. tanks allows you to refill your small green 1 lb propane bottles with the fuel from standard 20 lb propane tanks. Will save you a fortune
Refill Easily: Propane tank adapter perfect suitable for refillable 1 lb propane cylinder bottles and refills easily and quickly
Easy To Use: No other tools are required and easy to install with a handwheel grip for tightening
Sturdy Material: Propane adapter 20lb to 1lb converter well-constructed 100% high-quality solid brass construction makes it corrosion resistant sturdy
Safety: Built-in safety feature that will cut off gas flow automatically when pressure is reached

Product information

Package Dimensions 6.97 x 6.14 x 3.11 inches
Item Weight 3.87 ounces
Manufacturer GASPRO
ASIN B01N3CWU1E
Item model number GP-T218
Customer Reviews
4.6 4.6 out of 5 stars (8,286)

4.6 out of 5 stars
Best Sellers Rank #379 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)
#4 in Grill Connectors & Hoses
Is Discontinued By Manufacturer No

Top reviews from the United States

  • Marcos
    5.0 out of 5 stars Nice product
    Reviewed in the United States on January 13, 2025
    With this tool you no longer have to throw away gas cylinders but you can refill and recycle them, saving time and money. Recommended for BBQ and camping lovers.
  • Suzanne C.
    5.0 out of 5 stars Does what it's supposed to do
    Reviewed in the United States on December 17, 2024
    Bought to refill 1 pound propane containers from 20 pound tank. Easy to connect and does the job.
  • Boone.
    4.0 out of 5 stars Works good ????
    Reviewed in the United States on December 10, 2024
    Does what it's supposed to do.
  • M. W. Naylor
    5.0 out of 5 stars Makes filling small propane canisters a breeze. Follow instructions carefully.
    Reviewed in the United States on January 14, 2025
    This is an easy device to make refilling small propane tanks from the large ones. After closing the valve on the large tank, just attach the adapter to the large tank, then attach the small tank to the adapter, invert the whole assembly upside down, open the large tank valve to refill the smaller tank and close it when you no longer hear the liquid moving. Always wear safety goggles and do this transfer outdoors, since some gas will usually escape when disconnecting the small tank.

    This is a much cheaper method for filling small propane tanks than buying them already filled. 5 stars!
  • John P. Jones III
    5.0 out of 5 stars A ten to one no-brainer…
    Reviewed in the United States on November 30, 2022
    At my local big-box hardware store I am able to refill my 20 lbs. tank for approximately $20, thus $1 for a pound of propane. The same store sells six of the green 1 lb. gas cylinders for $60, thus $10 for a pound of propane, packaged more conveniently. This GASPRO refill adapter enables one to conveniently and safely refill the green 1 lb. bottles at one-tenth the price of purchasing new bottles. It is a no-brainer to use the adapter, particularly if one is a heavy user of the green bottles, as I was over the Thanksgiving holidays, when I had three going at once: one for boiling the water for coffee, a second for the camp stove cooking the bacon, and a third for the heater, as it was about 40 F. Over the four days I used 18 green bottles as it went below freezing each night.

    The adapter is easy to use. Simply thread one end onto the 20 lbs. tank, then thread the green cylinder onto the other end. Invert the 20 lbs. tank and open the valve to the 20 lbs. tank. One should be able to hear the hiss indicating that the green tank is filling.

    There are a number of instructional “how to” YouTube videos on this process. I found some contradictions. For example, one said that it is best to take the green gas cylinder from a freezer. Another swore that his kitchen scales indicated that there was no difference in the amount of propane transfer, between the freezer version and the room temperature version. Both however approved of the process.

    Not so a warning video from the Department of Transportation, saying it was (sorta) illegal to refill them, and not wise to boot. Looking at it closely, it appears to be an industry funded “scare” video. Sure, we should never refill around on open flame. And I strongly suspect that the purported thin walls of these tanks could withstand 500 refills, much like a Scuba diving tank.

    One issue that I did not see addressed: if one is refilling ten green cylinders or so, it might only take five minutes to fill from a 20 lbs. tank which is completely filled. By the 10th cylinder, it takes longer, and I found that one hour is better than a half an hour. I’m still working on refining the estimates for the length of time as a function of the fullness of the larger tank.

    For now, though, this adapter is a great way to save a bundle of money… perhaps enough to pay for the gasoline to drive to the campsite. Attached is a picture of the inverted 20 lbs. tank filling a green 1 lb. cylinder. 5-stars, plus.
    Customer image
    John P. Jones III
    5.0 out of 5 stars A ten to one no-brainer…
    Reviewed in the United States on November 30, 2022
    At my local big-box hardware store I am able to refill my 20 lbs. tank for approximately $20, thus $1 for a pound of propane. The same store sells six of the green 1 lb. gas cylinders for $60, thus $10 for a pound of propane, packaged more conveniently. This GASPRO refill adapter enables one to conveniently and safely refill the green 1 lb. bottles at one-tenth the price of purchasing new bottles. It is a no-brainer to use the adapter, particularly if one is a heavy user of the green bottles, as I was over the Thanksgiving holidays, when I had three going at once: one for boiling the water for coffee, a second for the camp stove cooking the bacon, and a third for the heater, as it was about 40 F. Over the four days I used 18 green bottles as it went below freezing each night.

    The adapter is easy to use. Simply thread one end onto the 20 lbs. tank, then thread the green cylinder onto the other end. Invert the 20 lbs. tank and open the valve to the 20 lbs. tank. One should be able to hear the hiss indicating that the green tank is filling.

    There are a number of instructional “how to” YouTube videos on this process. I found some contradictions. For example, one said that it is best to take the green gas cylinder from a freezer. Another swore that his kitchen scales indicated that there was no difference in the amount of propane transfer, between the freezer version and the room temperature version. Both however approved of the process.

    Not so a warning video from the Department of Transportation, saying it was (sorta) illegal to refill them, and not wise to boot. Looking at it closely, it appears to be an industry funded “scare” video. Sure, we should never refill around on open flame. And I strongly suspect that the purported thin walls of these tanks could withstand 500 refills, much like a Scuba diving tank.

    One issue that I did not see addressed: if one is refilling ten green cylinders or so, it might only take five minutes to fill from a 20 lbs. tank which is completely filled. By the 10th cylinder, it takes longer, and I found that one hour is better than a half an hour. I’m still working on refining the estimates for the length of time as a function of the fullness of the larger tank.

    For now, though, this adapter is a great way to save a bundle of money… perhaps enough to pay for the gasoline to drive to the campsite. Attached is a picture of the inverted 20 lbs. tank filling a green 1 lb. cylinder. 5-stars, plus.
    Images in this review
    Customer image
  • the-big-bend
    5.0 out of 5 stars Work well
    Reviewed in the United States on September 26, 2024
    I use it to refill those 1-lb green Coleman propane canisters and this works really well. Get a high quality kitchen table top scale to measure how much propane is in the bottle so you do not overfill. Measure before to know the weight of the empty bottle + any propane inside, and measure again during refill. One lb of propane = 453 g, the maximum amount of propane that can be safely stored in the bottle. Creating a temperature differential can speed up the transfer. So you don't have to put the 1-lb bottle in the freezer and the 20 lb bottle in the hot sun. However, if you do, the refill can be so much faster, and can be done in less than 5 min. Measure frequently during refill as the speeds vary greatly depends on the established temperature gradient, ambient temperature, etc.
  • Josh
    5.0 out of 5 stars ~~IT WORKS GREAT BUT BE CAREFUL~~
    Reviewed in the United States on December 1, 2023
    I want to start by saying that this works exactly as it should. But there are some things that should be considered for it to be effective and/or safe.

    Most people aren't going to store a tank in the freezer and another in heat before starting as this listing implies. Maybe that works but I didn't do it and, as others have mentioned, you need to release pressure from the small tank to allow propane to flow into it from the larger tank. The issue is that you can overfill your tank as I did the first time.

    I have 4 small tanks. 2 were empty and 2 are brand new. I weighed my new tanks and both weighed 1 lb 14.9 - 15 oz. After releasing pressure from one of my used tanks and filling it with this adapter, I weighed it and it was 2 lbs 4 oz. It was so full that when I shook it, I couldn't hear anything move inside. Propane expands when it heats up so it could have very well exploded if left in a hot car or some other circumstance.

    So I decided to release some propane. I first used a straw from a WD40 can but it immediately froze my fingers as it spewed out (it's extremely cold). I ultimately used this tool (removed from the larger tank) and screwed it into the little tank until the valve was depressed enough for it to emit propane. I repeatedly released and checked the weight until it weighed 1 lb 14.9 oz. For my 2nd tank, I released less pressure initially so it didn't accept as much propane. Several times, I released pressure, added more from the large tank, and weighed it until it reached full capacity.

    In short, this thing works great but should be used with caution. Weigh it as you fill it or you risk an explosion with damage to property and potentially injuries/death. Also, only do this outdoors, away from open flames. Some propane will escape as you're disconnecting and releasing pressure. Propane is heavier than air so it will fall to the floor and could ignite.

    I have now labeled each of my small tanks with the expected weight so the next time I fill them, there will be no question how much it should weigh when filled.
  • Donald
    5.0 out of 5 stars It was made well
    Reviewed in the United States on October 5, 2024
    It worked well and it was simple some of the most important things in life

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