Stupid Question Alert!

[JohnJan]

Could someone explain to me the reason an on-board gas tank of 30 litre volume doesn't have a 30 litre usable amount? I've been told that I'll have 24 litres of usable gas, where's the rest!

I am assuming there is a logical explanation but am relating to a bottle of wine!

 

[2657]

Filling bottles to capacity is extremely dangerous, the liquid gas needs space to evaporate before exiting the bottle otherwise liquid gas would be released, possibly to the hob or other appliance.

 

[tacr2man]

Regulations require a space be left for expansion /evaporation

 

[MikeD]

Max 80% fill if I remember correctly

 

[highwayman]

MikeD is correct 80% max fill
Cheers. Nige

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[DBK]

...but am relating to a bottle of wine!

Even a bottle of wine has an airspace below the cork.

 

[romany]

80% refill rule 20% to allow for expansion as others have said my 25litre tank is only allowed 19.3 litres but I have found most pumps won't refill it above around 18 litres

 

[JohnJan]

Thanks for the replies, instantaneous or what!

Will also be checking my wine more closely!!

 

[Ingwe]

Even a bottle of wine has an airspace below the cork.

Certainly has, once I've got to it!

 

[WillH]

It's not just regulations, it's also physics.

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[Makingtrax]

Filling bottles to capacity is extremely dangerous, the liquid gas needs space to evaporate before exiting the bottle otherwise liquid gas would be released, possibly to the hob or other appliance.

In 2013 the Health and Safety Executive prosecuted a man who had sold more than 700 potentially dangerous adaptors to members of the public, enabling ordinary LPG cylinders to be filled at petrol stations.