So I've had the TFV4, TFV8 and I have a TFV12 coming so I've dealt with the top fill attys and never had an issue or a problem. Could you explain the reasoning behind what you said about it being anything but simple?
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What happens with atty's is there is a vacuum, this keeps the chamber from flooding.
With top fill attys, the chamber has to be isolated when the top is removed.
As soon as you open the top the vacuum is released & the chamber will flood or it will just leek right out the air flow hole.
This is the tricky part of a good top fill atty. With the dump tank there is no JFC/chamber isolation.
IMO this isn't good
I would bet dollars to doughnuts, it will leek like crazy when top filling.
Some mite say it has to be wicked correctly for there to be no leaking when filling.
I don't buy that, If you pack the chamber with cotton to avoid leaking it will Not! wick as efficiently.
When top filling atty's were first coming out, there were a few good examples of what I just explained.
The Haster but Cthulhu mods the Bellus, both good vaping tanks but flood & leek like crazy as soon as you open the top fill.
I personally had both these tanks & experienced this first hand. Now I would never buy a top fill tank with out JFC/chamber isolation.
30mm tanks are great, big decks for big builds, plenty of juice capacity Big air flow for those big clouds
I have 2 Supreme +'s 30mm You can't beat this tank for a 30mm atty.
It does every thing well, no leeks, big air, big deck, options 5mil 20 mil.
The + is on sale at GB for 30$ nice price! it usually sells for around 50$
