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Big Dripper autofeeding problem

Giraut

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I have this weird issue with my Big drippers: I fill the tank to the brim (and with thick VG too), and it holds the 5 ml of juice for days on end, no problems (I mostly drip with my Big Drippers, I only keep the tank full for when I drive). But then suddenly, the tank starts to empty itself: for hours, the deck is flooded and the vape is wet and crummy, until the tank is finally empty. There's no stopping it from slowly discharging juice into the chamber when it starts doing it. I don't handle my mod any different, I don't shake it, I don't open the tank or press the pump... I don't do anything: at some point, the tank bleeds itself dry and that's that.

Both my Big Drippers do that. Anybody knows what I might be doing wrong here? Or what might cause this?
 

Dampgebied

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It sounds like you've got a problem with your O-ring between your driptip and the tank. If the vacuum is no longer intact, the juice just flows into the dripping section (I just made that word up). Have you tried replacing that O-ring?
 

Giraut

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No, but both my Big Drippers are recent and they've always done that. Besides, they only start leaking after a few days. I'm starting to wonder it it has anything to do with atmospheric pressure, i.e. when I fill up the tank in fair weather, and then rainy weather comes and the lower atmospheric pressure starts pulling juice out. But then I've tried holding my mod upside down and pressing the pump to balance the air pressure inside and outside the tank, but that don't stop the leaking. When it starts, it won't stop until the tank is empty. It's a total mystery to me...
 

Dampgebied

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No, but both my Big Drippers are recent and they've always done that. Besides, they only start leaking after a few days. I'm starting to wonder it it has anything to do with atmospheric pressure, i.e. when I fill up the tank in fair weather, and then rainy weather comes and the lower atmospheric pressure starts pulling juice out. But then I've tried holding my mod upside down and pressing the pump to balance the air pressure inside and outside the tank, but that don't stop the leaking. When it starts, it won't stop until the tank is empty. It's a total mystery to me...
This is indeed very strange. I use the Big Dripper on pseudo-daily basis and I've never encountered this problem with it. Are they original BD's? Did you get them through Fasttech? Maybe, just maybe, the grooves for the O-rings are too deep. Here's what I would do:
I'd wind some dental floss in the O-ring grooves (all of them), replace the O-rings and check if this would help. My other option would be to move to some place at sea level ;)
 

Giraut

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They're clones (from Winsmoke). No way I'm paying as much as the originals for stupid atomizers...They work very good most of the time. It's only that issue, which I reckon I wouldn't even have if I vaped mostly out of the tank, as this atomizer was designed to be used. Still, it's odd that it should misbehave only after some time, and not rightaway.

I already live close to sea level: most of Belgium isn't exactly mountainous :)
 

Dampgebied

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Groet uit Nederland en succes. Ik weet het ook niet verder.
 
My big dripper clone has done that before. It's only happened when it was really hot outside and my atty was really hot though. It sucks when that happens, sorry you're having issues with it. I love the big dripper as just a dripper and I have gone back to my tank setup for when I'm driving.
 

Giraut

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Yeah it's not ideal, but it's good enough. I'll stick with the BD until a better system comes on the market - hopefully something with a direct displacement pump and not yet another vacuum-based liquid holder.
 

tick22

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mm, maybe letting the juice sit in the tank for a few days is the problem. I use mine daily with others and I seem to have to refill it at least twice a day and and the end of the day, it is empty or nearly empty. So I have never had that problem. Maybe use it more or don't fill it up all the way. Try half a tank and see what happens. Fill with the top extended instead of flush.

Good luck, it is a good dripper for on the move....
 

WharfRat1976

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Air pressure has significant impact on an atty as well as temperature. I have the Aqua, FoggerV4, KFL+ and most recently the Lemo and they all have failed at some point. O rings and seals are good places to look as has been stated. Over wicking as well.
 

Kemosabe

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my (FT) big dripper auto drips too. but incredibly slowly. almost to the point where its neither flooded nor dry at any time. kind of annoying, but kind of perfect at the same time. i worry that it might auto drip too much, but so far that hasnt happened. i only press the drip tip a few times throughout the whole tanks worth. no flooding, no dry hits. i think, for me anyway, it has to do with the way i vape. it doesnt auto-drip when im not vaping it. i think what happens is when i vape (i take deep lung inhales), im pulling enough pressure to draw some liquid from the tank. i do see a tiny air bubble come up every couple of hits, but i never see the air bubble when im not vaping it. im also not really looking at it when im not vaping it, so im not 100% sure but my theory seems plausible.
 

CurlyxCracker

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This is my theory. If you fill it up past the threads liquid will be pushed out as you screw it together. The flow of liquid continues like a syphon. If you fill below the threads when you push down to release liquid and release it draws air back through the holes stopping the flow of liquid. So, don't overfill and push your drip tip to stop liquid from flowing.
 

Giraut

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Well, even if the O-rings are perfect on this device, the design is flawed: it can only work if the feed hole at the bottom of the device is covered by juice. As long as there's juice over it, the vacuum at the top of the tank keeps the juice from draining. But as soon as the hole is uncovered, air gets into the tank, the pressure equalizes, and when juice covers the hole again, some of it flows down until the vacuum returns. That's bound to happen all the time, just moving/tilting the mod if the tank isn't almost full.

I think that's what's going on with my BDs: it keeps the liquid inside when the tank is really full, but at some point, air gets in for some reason, and just using the mod normally is enough to start the leakage.

I've never been fond of this design. That's why I didn't buy the original BD in the first place, and waited for the clone to try it out. I guess it's good enough if you vape out of the tank exclusively: the leakage is slow enough that, if you use the pump all the time, you'll never see it. But if you want to keep juice stored up in the tank for a long time, it ain't gonna happen.

I guess what I'll do is keep the tank empty all the time, and just fill it up before a long drive. Either that or I'll try to devise a valve part inside the tank to close the hole when the pump is up.
 
Well I did it, I built my first sub ohm coil and it reads at .9ohms. I installed it into my fogger 4.1 and @ 11 watts in my itaste MPV with no issues so far. But there is one issue and that is taste, it's not there. Any suggestions?


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cc7aefcc8e8fc04a7167f0728593b3bc.jpg
 

tick22

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could be many things, first off the wicking, it may be your problem. You might try playing with the watts.
 

TheWestPole

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Well, even if the O-rings are perfect on this device, the design is flawed: it can only work if the feed hole at the bottom of the device is covered by juice. As long as there's juice over it, the vacuum at the top of the tank keeps the juice from draining. But as soon as the hole is uncovered, air gets into the tank, the pressure equalizes, and when juice covers the hole again, some of it flows down until the vacuum returns. That's bound to happen all the time, just moving/tilting the mod if the tank isn't almost full.

I think that's what's going on with my BDs: it keeps the liquid inside when the tank is really full, but at some point, air gets in for some reason, and just using the mod normally is enough to start the leakage.

I've never been fond of this design. That's why I didn't buy the original BD in the first place, and waited for the clone to try it out. I guess it's good enough if you vape out of the tank exclusively: the leakage is slow enough that, if you use the pump all the time, you'll never see it. But if you want to keep juice stored up in the tank for a long time, it ain't gonna happen.

I guess what I'll do is keep the tank empty all the time, and just fill it up before a long drive. Either that or I'll try to devise a valve part inside the tank to close the hole when the pump is up.

Thanks for taking the time to write your posts so clearly @Giraut.

I just got my first BD V2 clone and haven't got it going yet. Your cogent analysis re vacuum and leakage makes sense to me and I take it as a fair warning about how to use this atty.

I don't intend to use it as a dripper, just RTA. My thought, considering what you have said, is that I might minimize leaking issues by keeping it upright when in use and refilling before the juice gets too low. That is, keep the feed hole covered with juice. When not using it keep it upside down. And when using again to be mindful of the initial re-start time when the vacuum is not yet established, which means hitting it hard for a bit until it does. Have I interpreted what you have said correctly for my style of use?
 
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TheWestPole

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BTW, this is the model I got today. Just disassembled for soaking. The feed hole could not be more than .5mm dia. I would never have suspected that leaking just from a lack of vacuum would be a big issue, though temp and air pressure changes obviously could, as with most RTAs.

Screenshot 2014-11-22 at 8.58.45 PM.png
 
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tick22

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Not all of us have leaking, so maybe it is weather, pressure or some other reason. I have yet had mine leak and I use it a lot. maybe because I use it a lot, it does not have a chance to leak and I fill it as I get a loss of flavor. I also chain vape so I may vape it down to almost nothing and fill it before it has a chance to leak...
who knows for sure.
 

TheWestPole

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Not all of us have leaking, so maybe it is weather, pressure or some other reason. I have yet had mine leak and I use it a lot. maybe because I use it a lot, it does not have a chance to leak and I fill it as I get a loss of flavor. I also chain vape so I may vape it down to almost nothing and fill it before it has a chance to leak...
who knows for sure.

Thanks. Will yours flood when not in use if it's kept upright. Or do you put it away upside down?
 

tick22

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I normally vape it empty at night and leave it that way. if you do the upside down bit, make sure the coils don't have any extra juice on them or again, you will have a slight mess. I hit it a couple of times then pump it a couple of times and hit it again for 2 to 4 times. you will be able to tell when you are close to needing to pump after the first hour or so of use.
Hint:
You lose some of the flavor, never have had a dry hit yet, so i must be doing something right...
 

Giraut

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When not using it keep it upside down. And when using again to be mindful of the initial re-start time when the vacuum is not yet established, which means hitting it hard for a bit until it does. Have I interpreted what you have said correctly for my style of use?

I don't think you need to keep it upside down. As long as the hole is covered, you're good. My BDs don't leak when they're at rest: I think the leakage starts when I disturb the pressure balance all the time simply by using the device.

As for the initial leakage, yes it does that a bit after you feel it up. But honestly, it doesn't leak very much before it stops. If you fill it to the brim like I do, it won't leak at all in fact. Just remember to screw the base onto the tank hole up after filling it up, to let the air out. Otherwise it'll shoot juice out until the base is fully screwed.

If you use the tank all the time for vaping, I don't think you'll ever see a leakage problem. For me, it occurs because I almost never use it: I use my BDs as regular drippers most of the time, and the tanks only when I drive, which is very, very seldom. I reckon the tank system isn't suitable for long term juice storage, but it's fine for regular, everyday use. Especially since it doesn't hold that much juice really: 6 to 10 pump actions at the most. If I start chain-vaping, that lasts me an hour :)
 

TheWestPole

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I normally vape it empty at night and leave it that way. if you do the upside down bit, make sure the coils don't have any extra juice on them or again, you will have a slight mess. I hit it a couple of times then pump it a couple of times and hit it again for 2 to 4 times. you will be able to tell when you are close to needing to pump after the first hour or so of use.
Hint:
You lose some of the flavor, never have had a dry hit yet, so i must be doing something right...

One strike against upside down. Good point, extra juice in the well.
 

TheWestPole

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I don't think you need to keep it upside down. As long as the hole is covered, you're good. My BDs don't leak when they're at rest: I think the leakage starts when I disturb the pressure balance all the time simply by using the device.

As for the initial leakage, yes it does that a bit after you feel it up. But honestly, it doesn't leak very much before it stops. If you fill it to the brim like I do, it won't leak at all in fact. Just remember to screw the base onto the tank hole up after filling it up, to let the air out. Otherwise it'll shoot juice out until the base is fully screwed.

If you use the tank all the time for vaping, I don't think you'll ever see a leakage problem. For me, it occurs because I almost never use it: I use my BDs as regular drippers most of the time, and the tanks only when I drive, which is very, very seldom. I reckon the tank system isn't suitable for long term juice storage, but it's fine for regular, everyday use. Especially since it doesn't hold that much juice really: 6 to 10 pump actions at the most. If I start chain-vaping, that lasts me an hour :)

Okay, two strikes against upside down. Not needed.

I'll just take the plunge here and see. I'm not big on drippers, great tasting/breathing though they are. My main attys are Orchids. For single coils I'm phasing out Kayfun in favor of Sat22, because I can get dripper taste with as open a draw as I want to drill it out to.

The BD will start as a flavor testing platform, replacing a straight dripper. Drip a new juice recipe. If no good, rinse and repeat with changes. If good, fill up the tank and enjoy the result for awhile. Will see where it goes from there. But even if it just does that well, I'm gonna be pleased. :)
 

CurlyxCracker

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Okay, two strikes against upside down. Not needed.

I'll just take the plunge here and see. I'm not big on drippers, great tasting/breathing though they are. My main attys are Orchids. For single coils I'm phasing out Kayfun in favor of Sat22, because I can get dripper taste with as open a draw as I want to drill it out to.

The BD will start as a flavor testing platform, replacing a straight dripper. Drip a new juice recipe. If no good, rinse and repeat with changes. If good, fill up the tank and enjoy the result for awhile. Will see where it goes from there. But even if it just does that well, I'm gonna be pleased. :)
I use an omega, dedicated, with wickless coil to test new Recipes. I find that wick will retain, too much flavor.
The Big Dripper is one of my top attys. Orchid is nice (v3, I'm waiting for that taifun nano tank, v4 chimney to come in) but as of right now, big Dripper wins, mainly ease of use, no fiddling with fill screw, easily holds more, flavor/air flow win hands down IMHO
 

heateris

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BTW, this is the model I got today. Just disassembled for soaking. The feed hole could not be more than .5mm dia. I would never have suspected that leaking just from a lack of vacuum would be a big issue, though temp and air pressure changes obviously could, as with most RTAs.

View attachment 9206

I already have the all SS version, but I ordered this one yesterday. How do you like it?


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Steam Powered

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One of my friends and I both bought BD's at the same time from the same store.
We both run the same builds and wicks on the same mods running the same power range.
His auto feeds after it gets hot and mine never has, not even once.
I've even tried to chain vape mine to get it hot and make it do it and it won't.
His auto fed so much he stopped using it. Go figure.....
P.S. We live 10 miles from each other so altitude is not the reason.
 

TheWestPole

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I already have the all SS version, but I ordered this one yesterday. How do you like it?

Been busy and haven't done my first build yet. I can say that the machining is excellent for a clone, very neat finish grind and clean inside, looks great. The only burrs I found were on the inside of the air vents in the juice well, and they were minor. Seems like a top notch clone. Will report when I get it going.

One thing: Y'all probably know this but the clear tank section is compatible/identical with Kayfun. So you can have window colors or SS there if you like.


kft.png

http://www.fasttech.com/products/0/10009156/1644300-replacement-tank-sections-for-kayfun-3-1-kayfun

kft2.png

http://www.fasttech.com/products/0/10009156/1562801-replacement-spare-parts-for-kayfun-v3-1-atomizer
 
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TheWestPole

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One of my friends and I both bought BD's at the same time from the same store.
We both run the same builds and wicks on the same mods running the same power range.
His auto feeds after it gets hot and mine never has, not even once.
I've even tried to chain vape mine to get it hot and make it do it and it won't.
His auto fed so much he stopped using it. Go figure.....
P.S. We live 10 miles from each other so altitude is not the reason.

Hmmm. What to make of this? :confused:
 

Steam Powered

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Hmmm. What to make of this? :confused:
Gotta be slight difference in build quality is my conclusion.
Happens all the time with vape gear and the Big D is a pretty sensitive set up with the vacuum deal and all.
 

TheWestPole

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Gotta be slight difference in build quality is my conclusion.
Happens all the time with vape gear and the Big D is a pretty sensitive set up with the vacuum deal and all.

I hear you, but what in particular is off? I hate when I can't fix a slightly off clone myself. :mad:
 

Steam Powered

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My best guess WestPole is that some have a ever so slightly bigger juice hole in the dome.
I can't prove that but that's the only logical solution I can come up with.
And if that's the case there's no way to fix it..
 

TheWestPole

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My best guess WestPole is that some have a ever so slightly bigger juice hole in the dome.
I can't prove that but that's the only logical solution I can come up with.
And if that's the case there's no way to fix it..

Thanks. That would make sense. Mine looks tiny, maybe .5mm, though I haven't measured it. Getting ready to do my first build. Fingers crossed...
 

Steam Powered

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Thanks. That would make sense. Mine looks tiny, maybe .5mm, though I haven't measured it. Getting ready to do my first build. Fingers crossed...
Well get ready for some awesome flavor. That tight chamber makes some real nice vapor.
2-6/7 wrap 24ga coils @0.3ohm in mine and love it.
 

TheWestPole

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If you use the tank all the time for vaping, I don't think you'll ever see a leakage problem. For me, it occurs because I almost never use it: I use my BDs as regular drippers most of the time, and the tanks only when I drive, which is very, very seldom. I reckon the tank system isn't suitable for long term juice storage, but it's fine for regular, everyday use. Especially since it doesn't hold that much juice really: 6 to 10 pump actions at the most. If I start chain-vaping, that lasts me an hour :)
Well get ready for some awesome flavor. That tight chamber makes some real nice vapor.
2-6/7 wrap 24ga coils @0.3ohm in mine and love it.
Agreed, it's a great rda, Pump aside. The deck is very omega like, but done right.

Well, this V2 is a champ so far. You guys were right. :D Did a conservative .6 ohm build, wicked with j-cotton, fairly short tails ending bluntly right at the bottom surface of the juice well. Wicking great, giving subtle taste change when it's time to give it a squirt. Taste is excellent and it breathes fantastically. I'm used to drilling out most RTAs to get the easy lung hits I just gotta have, but this has plenty of air even at half the maximum setting. It really is a great RDA. A two story RDA with a juice tank on the second floor.

I haven't been using it long enough to run into any auto-feeding and flooding. Neither have I used it yet for my intended purpose: to test juice recipes, and when it's a good one fill the tank and enjoy it for a while. Will soon see about all that. For now I'm just enjoying a really great vape.

No surprise to you all I imagine. :)
 
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Steam Powered

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The V2 has addressed all the con's of the V1. The first version worked good but had only one juice hole so one side of your build always got more juice when you pumped. V2 has 2 holes. Plus you can see your juice level in the 2 and it top loads now, so I'm sure it's really good RBTA as long as you don't get the dreaded auto feed flood.
 

TheWestPole

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The V2 has addressed all the con's of the V1. The first version worked good but had only one juice hole so one side of your build always got more juice when you pumped. V2 has 2 holes. Plus you can see your juice level in the 2 and it top loads now, so I'm sure it's really good RBTA as long as you don't get the dreaded auto feed flood.

Huh? Mine has only one juice hole. And I haven't seen a model with two. :confused: Actually inadequate juice feed is the only issue I have had. Pumping stops producing any juice below. I've pulled the upper section and poked a wire through the hole, which seemed to get it going again. Not sure obstruction is the issue. Pumping with the upper off and tank half filled I see very little coming through. Find myself pumping like crazy. Wondering whether the top cap o-ring isn't sealing well enough and air is coming out the top rather than juice below. Will try swapping it out. :confused:
 

Giraut

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I think there's a great deal of confusion about the Big Dripper V2. For some time, there has been on the market a clone from FastTech that calls itself the BDv2 with a PMMA tank - essentially a BDv1 with a clear plastic tank, but with exactly the same pump mechanism:

big-dripper-rda-atomizer-v1-v2-5ml-newest.jpg


And then last week, the original manufacturer, Sub-Ohm Innovations, has come out with their BDv2: it's a device with a metal tank but a different pump mechanism that sports a one-piece plunger, a fill screw and an optional copper RDA bell:

genuine_Big_Dripper_v2_from_Sub-Ohm_Innovations_zps2c44f708.jpg


Quite frankly, I wouldn't touch the FastTech v2 with a 10-foot pole: I know what happens when the juices I vape touch PMMA. The real v2 seems more interesting, if the pump works a little better (I doubt it though) and if it's easier to fill to the brim.
 

TheWestPole

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I think there's a great deal of confusion about the Big Dripper V2. For some time, there has been on the market a clone from FastTech that calls itself the BDv2 with a PMMA tank - essentially a BDv1 with a clear plastic tank, but with exactly the same pump mechanism:

big-dripper-rda-atomizer-v1-v2-5ml-newest.jpg


And then last week, the original manufacturer, Sub-Ohm Innovations, has come out with their BDv2: it's a device with a metal tank but a different pump mechanism that sports a one-piece plunger, a fill screw and an optional copper RDA bell:

genuine_Big_Dripper_v2_from_Sub-Ohm_Innovations_zps2c44f708.jpg


Quite frankly, I wouldn't touch the FastTech v2 with a 10-foot pole: I know what happens when the juices I vape touch PMMA. The real v2 seems more interesting, if the pump works a little better (I doubt it though) and if it's easier to fill to the brim.

Damn, I don't often get taken in by bullshit versions, but as a BD noob it sure looks like I did this time. Thankfully it was cheap. Post #20 is the one I have. The vape is still great, but the pump system is faulty. I'm going to look into the one you're talking about and see if I can borrow any ideas that might help with my juice feed. Thanks Steam.
 
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CurlyxCracker

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I think there's a great deal of confusion about the Big Dripper V2. For some time, there has been on the market a clone from FastTech that calls itself the BDv2 with a PMMA tank - essentially a BDv1 with a clear plastic tank, but with exactly the same pump mechanism:

big-dripper-rda-atomizer-v1-v2-5ml-newest.jpg


And then last week, the original manufacturer, Sub-Ohm Innovations, has come out with their BDv2: it's a device with a metal tank but a different pump mechanism that sports a one-piece plunger, a fill screw and an optional copper RDA bell:

genuine_Big_Dripper_v2_from_Sub-Ohm_Innovations_zps2c44f708.jpg


Quite frankly, I wouldn't touch the FastTech v2 with a 10-foot pole: I know what happens when the juices I vape touch PMMA. The real v2 seems more interesting, if the pump works a little better (I doubt it though) and if it's easier to fill to the brim.
Come on clone the real v2 so I can afford it! The copper top is a nice addition as well!
 

CurlyxCracker

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I haven't been able to find detailed pics of real V2. I wanna see the "one piece pump" and the other improvements. :mad:
I don't think it's been actually released... I think they were just showing it off/giving one away at vape summit.
 

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