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[Solved] Refueling 11 kg Gas Cylinder: Conflicting Capacities & Safe Refueling Amount (80% or 85% Rule)

DIABLO1410 54618 14
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  • #1 19717064
    DIABLO1410
    Level 4  
    Posts: 94
    Rate: 19
    Hi everyone. Listen, I've read various forums and some say that the 11 kg cylinder contains 22 liters, the second 20 liters and the third 27.2 liters. Considering that the 11 kg cylinder actually holds 27.2 while maintaining the current rule when refueling no more than? Exactly. Another question arises, some claim that it is 80% as I wrote above, while others say 85. Let's stay with 80. So:
    27.2 - 5.44(80%) = 21.76
    So the safest way to refuel is 20l.
    Worse, if the true hypothesis is 11 x 2 = 22l of gas, then with the 80% rule, it comes out to 17.6 liters, which is 15 safely. So a question for you.
    Which of the hypotheses is actually true. I care about the answer. I filled up with 15 L today. I didn't want to risk it without being sure which school was the real one. We know how it could end ... By the way, when buying a cylinder at the station, we have the full value there (27.2) if so, why, considering that it is actually 27.2, ordinary Mirek refuels 20. Anyway, I will be grateful for help how much can i refuel. And what theory about the capacity of the 11 kg cylinder is true?

    I immediately say that comments like this are forbidden, please keep to yourself. If I didn't have to, I wouldn't do it. The times when you paid 50 for a cylinder are gone now the price at the station 120 and transport 150/170. Cool? Inflation... See how much you can save.

    Ps: I already have a refueling adapter. ?

    Thank you in advance and best regards.
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  • #2 19718191
    qwert2000
    Level 14  
    Posts: 103
    Help: 10
    Rate: 25
    Is it possible to refuel at the gas station? On those who have been, it probably says on all that they do not refuel into the cylinder. According link a liter of LPG weighs about 0.52 kg.
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  • #3 19718232
    bambus94
    Level 34  
    Posts: 2414
    Help: 243
    Rate: 710
    On the cylinders that I saw, it was written on the rating plate how much capacity they had, and from what I remember it was something like 27 l.
    How much to refuel? Well, about 22 l, because it can be more per kg, because the Propane-Butane mixture has different densities depending on the season, in winter it has a lower density because it contains more Propane, which has a lower density and lower heat of combustion than butane.
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  • #5 19718959
    DIABLO1410
    Level 4  
    Posts: 94
    Rate: 19
    stachu_l wrote:
    Or maybe this bottle:
    https://www.igaz.pl/p1671,gas-camper-bottle-camping-11-kg-27-l-adaptery-do-tanowania.html
    Only this price


    I saw. But I have a better offer, so I was just looking for a cylinder with a safety valve and found such a bottle.

    https://allegro.pl/oferta/gasbank-ls-11kg-lekka-cylinder-lpg-z-zaworem-80-opd-10884995106.


    But I was thinking about a 100l tank or a tank from a car installation

    Added after 1 [minutes]:

    qwert2000 wrote:
    Is it possible to refuel at the gas station? On those who have been, it probably says on all that they do not refuel into the cylinder. According link a liter of LPG weighs about 0.52 kg.



    The station doesn't really fill up. You refuel yourself. There is also a ban on them. But there's a perfect station near my house.

    Added after 49 [seconds]:

    bambus94 wrote:
    On the cylinders that I saw, it was written on the rating plate how much capacity they had, and from what I remember it was something like 27 l.
    How much to refuel? Well, about 22 l, because it can be more per kg, because the Propane-Butane mixture has different densities depending on the season, in winter it has a lower density because it contains more Propane, which has a lower density and lower heat of combustion than butane.


    So 22L will be great in winter as well as in summer. Thank you.
  • #6 19719052
    tomjed
    Level 28  
    Posts: 1065
    Help: 81
    Rate: 302
    Only 22lx3.4, you get 74.8 ... In casto gas for the cylinder, it's PLN 57, where is the point of this ... I'm asking because I really can't see ...

    kiss
  • #7 19719057
    karolark
    Level 42  
    Posts: 14267
    Help: 701
    Rate: 2469
    tomjed wrote:
    Only 22lx3.4, you get 74.8 ... In casto gas for the cylinder, it's PLN 57, where is the point of this ... I'm asking because I really can't see ...

    kiss


    I'm of the same opinion, unless you want to be a hero in your yard.
    For many years I have been of the opinion that you need to earn and not save and so far it works. :D
  • #8 19719820
    zulugula
    Level 20  
    Posts: 342
    Help: 26
    Rate: 62
    Some cylinders have a number 27 with a hook on the handle, and about 14 kg fit under the cork.
  • #9 19720113
    Michał_74
    Level 34  
    Posts: 2957
    Help: 184
    Rate: 611
    Hello.
    And why not put the cylinder on the scale, tare and pour 11 kg?
    Regards.
  • #10 19720701
    tomjed
    Level 28  
    Posts: 1065
    Help: 81
    Rate: 302
    Michał_74 wrote:
    And why not put the cylinder on the scale, tare and pour 11 kg?


    Have you been following this post from the beginning? The author wants to refuel at a station where it is FORBIDDEN !!! And what else is going to add weight...
  • #11 19721778
    Michał_74
    Level 34  
    Posts: 2957
    Help: 184
    Rate: 611
    Well, since it is forbidden and refuels, the weight does not bother me at all, apparently this friendly station.
    Another thing that surprised me was the prices listed there. Yesterday and today I looked at the nearby gas stations LPG prices 3.20-3.50 Yes, about.
    11 kg cylinder prices from about PLN 64-80 even. So the differences in replacement or refueling are almost zero. At least in the south of the Silesian Voivodeship.
    It's better not to fall into the trash. buy cylinder cylinders from the car. Add an original filler neck and refuel with less risk?
    I know about the cylinder, even without a certificate, it's hard because the neighbors from Ukraine take everything away. They can be without legalization.

    Regards.
  • #12 19732388
    Pan.Kropa
    Level 35  
    Posts: 3920
    Help: 249
    Rate: 1124
    DIABLO1410 wrote:
    The times when you paid 50 for a cylinder are over, now the price at the station is 120
    I don't know where you live, but in my area such a cylinder costs PLN 70.
  • #13 19787756
    steve2
    Level 17  
    Posts: 157
    Help: 26
    Rate: 49
    I always took 0.6 kg=1l of gas. I refueled 20 liters, sometimes in winter 22.
    The weight of the refueled cylinder and the replacement one is different.
  • #14 19789137
    Michał_74
    Level 34  
    Posts: 2957
    Help: 184
    Rate: 611
    steve2 wrote:
    I always took 0.6 kg=1l of gas. I refueled 20 liters, sometimes in winter 22.
    The weight of the refueled cylinder and the replacement one is different.


    Because this inscription usually with paint or marker on the cylinder 11kg is the weight of the cylinder itself.
    This is so that the guy refueling at the bottling plant can see how much the cylinder has and how much he should show after refueling it with 11 kg of gas.
    Just made a test today at a friendly gas station - with 12 cylinders after weighing with a bathroom scale because I had such differences in refueling in the range of 10.8-11.3 kg per cylinder plus iron.
    A little surprise there are cylinders in racks as 11kg for pica and these are cylinders for trolleys. The staff often gets it and puts it in another rack - no one has taken it from them yet as a trolley - as part of the comments.

    The faces of people refueling and watching us weigh in are priceless.

    Regards.
  • #15 20114523
    DIABLO1410
    Level 4  
    Posts: 94
    Rate: 19
    I bought a similar one on Allegro also with a safety valve.
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Topic summary

✨ The discussion revolves around the refueling capacities of 11 kg gas cylinders, with conflicting information regarding their actual volume, which is cited as 22 liters, 20 liters, or 27.2 liters. Participants debate the safe refueling limit, with some advocating for the 80% rule, suggesting a maximum of 21.76 liters based on the 27.2-liter capacity, while others argue for 85%. The conversation highlights the importance of adhering to safety regulations and the potential risks of overfilling. Users share personal experiences with refueling practices, the weight of gas, and the differences in cylinder capacities, emphasizing the need for accurate measurements and caution when refueling at stations where it may be prohibited.
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FAQ

TL;DR: Most 11 kg cylinders hold around 27 L; “about 22 l” is a safe 80% refill, with seasonal density shifts. [Elektroda, bambus94, post #19718232]

Why it matters: This FAQ helps DIYers refilling 11 kg LPG cylinders decide how many liters to pump, align with the 80% rule, and avoid costly mistakes.

Quick Facts

  • Typical water capacity: ~27 L; safe usable volume at 80% is ~21–22 L. [Elektroda, bambus94, post #19718232]
  • LPG density ≈ 0.52 kg/L; 11 kg ≈ 21 L at the pump (approx.). [“Właściwości gazu płynnego”]
  • Many LPG pumps post “no cylinder filling”; follow posted rules and use approved setups. [Elektroda, qwert2000, post #19718191]
  • OPD-equipped cylinders auto-stop at 80% fill; look for “80% OPD.” [“GasBank LS 11kg — zawór 80% OPD”]
  • Price example: 22 L × 3.4 PLN ≈ 74.8 PLN vs 57 PLN exchange; savings can vanish. [Elektroda, tomjed, post #19719052]

What is the actual capacity of an 11 kg LPG cylinder?

Many 11 kg cylinders show about 27 L water capacity on the rating plate. Users advise filling about 22 L to allow expansion space. Seasonal LPG blends change density, so a fixed liter number is a guideline. “Fill about 22 l.” Always read your cylinder’s plate before deciding. [Elektroda, bambus94, post #19718232]

Should I follow the 80% or 85% fill rule?

Follow 80%. Refillable cylinders with OPD valves are designed to shut off at 80% liquid level. Matching your practice to OPD geometry reduces overfill risk and aligns with widely used hardware. Look for cylinders clearly marked with an 80% OPD valve. [“GasBank LS 11kg — zawór 80% OPD”]

How many liters is 11 kg at the pump?

Use density to convert. Typical LPG is about 0.52 kg per liter. That makes 11 kg roughly 21 liters. If your cylinder’s water capacity is ~27 L, an 80% fill also lands near 21–22 L. Always confirm on a scale when possible. [“Właściwości gazu płynnego”]

Can I refuel an exchange cylinder at a car LPG station?

Many forecourt pumps display bans on filling loose cylinders. A user notes signs stating stations do not refuel into cylinders. If you see such signage, do not fill there. Use approved facilities or equipment intended for refilling. [Elektroda, qwert2000, post #19718191]

How do I refill by weight correctly?

Do it by weight to hit 11 kg of product.
  1. Put the cylinder on a scale and tare it.
  2. Pump until the scale increases by 11.0 kg.
  3. Stop, close valves, and leak-check. This avoids density guesswork and keeps you within the intended content mass. [Elektroda, Micha2_74, post #19720113]

What does the '11 kg' marking actually indicate?

Markings can confuse. One user reports the “11 kg” marking being treated as an empty reference during filling, targeting tare + 11 kg. They weighed 12 cylinders and saw 10.8–11.3 kg of gas delivered across units. Weighing your own cylinder helps verify the true content. [Elektroda, Micha2_74, post #19789137]

Why do refilled cylinders weigh differently from swapped ones?

Liters-to-kilograms conversion depends on LPG density. One user uses 0.6 kg per liter as a rule and refills 20–22 liters. Seasonal density changes and actual liters filled make net mass differ from swap cylinders. Weighing clarifies your true fill. [Elektroda, steve2, post #19787756]

Does LPG density change between seasons?

Yes. Users note winter LPG contains more propane, which has lower density and lower heat of combustion than butane. That shifts the liters-per-kilogram relationship. Plan liters conservatively and verify by weight when possible. [Elektroda, bambus94, post #19718232]

What does '27' stamped on the handle mean?

Users report some cylinders stamped “27” on the handle, indicating the capacity class. They also report varying masses “under the cork” in practice. Always read the rating plate and measure by weight to avoid assumptions. [Elektroda, zulugula, post #19719820]

Is 22 L okay year-round?

The thread author concluded 22 L worked in winter and summer. That aligns with an 80% fill on a ~27 L cylinder. Still, verify your plate and use a scale if possible to account for blend differences. [Elektroda, DIABLO1410, post #19718959]

Which cylinder or setup can reduce risk while refilling?

Use a cylinder designed for refilling with an 80% OPD valve, such as GasBank LS 11 kg. Some consider a vehicle-style LPG tank with a proper filler neck. These options address overfill and handling concerns noted in the thread. [Elektroda, DIABLO1410, post #19718959]

Is refilling cheaper than swapping a cylinder?

Not always. A user checked nearby LPG and swap prices and found the difference almost zero in the Silesian region. Assess current pump price versus swap price locally before deciding. [Elektroda, Micha2_74, post #19721778]

Any gotchas when swappingcould I get the wrong cylinder type?

Yes. A user found trolley cylinders placed in 11 kg racks. Staff sometimes misplace them. Weighing at pickup helps prevent surprises and ensures you get the intended product. [Elektroda, Micha2_74, post #19789137]

What adapter do I need for refueling?

The thread mentions a refueling adapter. Camper-style bottles are sold with refueling adapters included, simplifying compliant connections. Check the product’s listing for included adapter sets. [Elektroda, stachu_l, post #19718249]
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