Leaking Uwell Crown

[J.D. Merchant]

I have read review upon review about the uwell Crown, post upon post about how great of a atty it is. While I admitt I like it with the 316L S.S. Coil (since I decided not to use Ni200 any longer because I hate temperature control). Since day one I've had major leaking problems with it sometimes worse than others. I have left it on the shelf just to grab the mod a few days later and end up with a handful of juice from it just setting there doing nothing. Anyone else have this problem or have any insight? I notice there's a gap between the the coil and inner air shaft as well there's a joint with a o-ring where the lower and upper air shaft join near the top. It always leaks through the air flow slots at the base, thanks all.

 

[JMC17]

I haven't received my Uwell Crown tank just yet but i've been reading about it a lot and apparently it is a high VG tank, meaning that anything below 70% VG might very well not do the trick.

Also, i've seen quite a few people leaking because they're filling it from the top.
If you've been doing that, try filling it from the bottom!

 

[Hitmetwice]

If you could get to a vape shop to check out a new tank to compare yours to might be an idea as I suspect you might be missing an "O" ring somewhere. Empty and clean your tank first of course so you can take it right apart.

Sometimes a disassembly and good cleaning will fix the problem also. I do not use hot water, only luke warm so as to not risk deforming "O" rings and seals.

I do run very high PG liquid in mine (80-90%) and never had a leak.

Also, another thought, if you run high power and/or have had any dry hits/burnt hits with it some of the cotton has been burnt away from the coil and that will make it prone to leaking.

Lastly! Did you get your tank and coils from a reputable vendor?
A cloned tank or cloned coils might also be an issue. Cheers.

 

[J.D. Merchant]

I haven't received my Uwell Crown tank just yet but i've been reading about it a lot and apparently it is a high VG tank, meaning that anything below 70% VG might very well not do the trick.

Also, i've seen quite a few people leaking because they're filling it from the top.
If you've been doing that, try filling it from the bottom!

Thanks for taking the time to reply but VG is thinner than PG so it being thinner would make it more prone to leak. As with filling it at the bottom, it's a top fill tank not a bottom fill. If you turn it upside down or put it at too much of a tilt it would cause juice to enter the top of the airshaft as can also happen during filling if your not careful.

 

[J.D. Merchant]

If you could get to a vape shop to check out a new tank to compare yours to might be an idea as I suspect you might be missing an "O" ring somewhere. Empty and clean your tank first of course so you can take it right apart.

Sometimes a disassembly and good cleaning will fix the problem also. I do not use hot water, only luke warm so as to not risk deforming "O" rings and seals.

I do run very high PG liquid in mine (80-90%) and never had a leak.

Also, another thought, if you run high power and/or have had any dry hits/burnt hits with it some of the cotton has been burnt away from the coil and that will make it prone to leaking.

Lastly! Did you get your tank and coils from a reputable vendor?
A cloned tank or cloned coils might also be an issue. Cheers.

If you could get to a vape shop to check out a new tank to compare yours to might be an idea as I suspect you might be missing an "O" ring somewhere. Empty and clean your tank first of course so you can take it right apart.

Sometimes a disassembly and good cleaning will fix the problem also. I do not use hot water, only luke warm so as to not risk deforming "O" rings and seals.

I do run very high PG liquid in mine (80-90%) and never had a leak.

Also, another thought, if you run high power and/or have had any dry hits/burnt hits with it some of the cotton has been burnt away from the coil and that will make it prone to leaking.

Lastly! Did you get your tank and coils from a reputable vendor?
A cloned tank or cloned coils might also be an issue. Cheers.

I thing

If you could get to a vape shop to check out a new tank to compare yours to might be an idea as I suspect you might be missing an "O" ring somewhere. Empty and clean your tank first of course so you can take it right apart.

Sometimes a disassembly and good cleaning will fix the problem also. I do not use hot water, only luke warm so as to not risk deforming "O" rings and seals.

I do run very high PG liquid in mine (80-90%) and never had a leak.

Also, another thought, if you run high power and/or have had any dry hits/burnt hits with it some of the cotton has been burnt away from the coil and that will make it prone to leaking.

Lastly! Did you get your tank and coils from a reputable vendor?
A cloned tank or cloned coils might also be an issue. Cheers.

I think the high VG maybe to thin for the tank, the tank and coils are authentic Uwell. I thinks I'll rebuild it and replace the o-rings and try a higher PG maybe 50/50. Thanks!

 

[J.D. Merchant]

I do understand about clone coils!! Bought some on eBay for my Herakles Sense Plus the ad said Authentic but when I got them they were wrapped in bubble wrap with no markings what so ever and were absolutely horrible, after two tries I threw the other three out.

 

[puffon]

I notice there's a gap between the the coil and inner air shaft as well there's a joint with a o-ring where the lower and upper air shaft join near the top.

If you have gaps in these spots, it will leak.
Either the coil/tank is out of spec or the o-ring is bad, or just not tightened enough.
VG is thicker than PG.

 

[mattmc92]

Thanks for taking the time to reply but VG is thinner than PG so it being thinner would make it more prone to leak. As with filling it at the bottom, it's a top fill tank not a bottom fill. If you turn it upside down or put it at too much of a tilt it would cause juice to enter the top of the airshaft as can also happen during filling if your not careful.

It is dual fill, capable of top and bottom filling, both are quite simply to do.
Crown recommends wicking the coil from the top which may be new to some people who have used the side holes. They also recommend closing the airflow while filling which many people ignore. Don't know if this helps.

 

[JMC17]

Thanks for taking the time to reply but VG is thinner than PG

I think you got it backward! I must insist, I have two liter bottles of pure PG and VG, you can tell the difference just by shaking it. PG shakes very well, much like water. VG on the other hand is a viscous liquid and will not shake very well, very thick!

VG and PG Explained

On the other hand, Hitmetwice said he uses the tank with high PG and still doesn't leak, so I guess it's not an issue of liquid viscosity.

As with filling it at the bottom, it's a top fill tank not a bottom fill.

That's not entirely true, the uWell Crown is a bottom AND top fill tank

Here's a quote from one of many pages that sells this tank:

However, for those times that you do need to refill, you’ll be pleased to know that the Crown tank features a top fill and bottom fill system

UWell Crown Sub Ohm Tank | Ecig.com


I may not have the tank in my hands just yet but don't underestimate the amount of research i've done!

 

[J.D. Merchant]

If you have gaps in these spots, it will leak.
Either the coil/tank is out of spec or the o-ring is bad, or just not tightened enough.
VG is thicker than PG.

Interesting, the juice I buy now is 70%VG/30%PG and is thinner than when I use to use 50/50%.

 

[J.D. Merchant]

I think you got it backward! I must insist, I have two liter bottles of pure PG and VG, you can tell the difference just by shaking it. PG shakes very well, much like water. VG on the other hand is a viscous liquid and will not shake very well, very thick!

VG and PG Explained

On the other hand, Hitmetwice said he uses the tank with high PG and still doesn't leak, so I guess it's not an issue of liquid viscosity.



That's not entirely true, the uWell Crown is a bottom AND top fill tank

Here's a quote from one of many pages that sells this tank:



UWell Crown Sub Ohm Tank | Ecig.com


I may not have the tank in my hands just yet but don't underestimate the amount of research i've done!

I am just saying the manufacturer list it as a top fill tank but yes you could bottom fill it but could cause juice to get into the air shaft while it's upside down. The top portion of the top that holds the tank glass secure is recessed from the top itself. I know if I over fill it to close to the top it causes the juice to go into the airshaft.

 

[Kandem]

I love my crown....best tank I have used by far. I do not have it sitting in front of me, but I do believe there should be an o-ring where the crown part of the chimney meets the top of the coil. Also, does the chimney not thread into the crown portion that I was just talking about? The only time I have ever had any significant flooding and leaking is when I forgot to close my air holes when filling. Doing so ruins the pressure balance that is required to be in the tank. If your juice is 70/30 VG/PG then is it possible that the manufacturer possibly mislabelled the bottle and it is actually 30/70 (this would be more runny, less thick)? I have seen this happen with B&M made juices rather than brand name juices.

 

[JMC17]

I am just saying the manufacturer list it as a top fill tank

Crown

The Crown Sub-Ohm Tank features support for top and bottom filling, allowing it to be filled easily and conveniently based on user preference.

The manufacturer clearly list it as a bottom and top fill tank.
You should be able to fill it from the bottom without leaks, unless the manufacturer is being shady by saying it's both top and bottom.

That being said, if you feel like it's going to leak by filling it from the bottom then I won't argue!
Rather be safe than sorry!
I should have the tank in the next few days, only then will I be able to test it out myself.

Personally one of my tank kept leaking and I even left a somewhat bad review for that tank,
when after some time I realized my atomizer wasn't threaded properly, there was a rather small gap between the atomizer's shell and the cotton itself. I noticed it after washing it and priming it for the second time, the first time I just disregarded it as I did not know it would lead to leaking, then I forgot about it.
After changing that atomizer and leaving it away from my working ones, my tank stopped leaking.

Also, some people had deformed O-rings on the uWell Crown tank after washing it in hot water.

There's this thread someone made about a year ago with the similar problem, I read a bit through it and there's some interesting stuff in there. I believe the OP managed to fix his by drying his o-rings, but I really just quickly read the thing, I might be wrong!

Here's the link if you want to give it a look.
Uwell Crown stock coils leaking...

I hope you find a solution, it really sucks to have a leaky tank.

 

[Eric LeClair]

I'm beginning to lose hope . . . I have a similar situation but I think the only solution might be to replace the whole thing. Unless someone can save us both

 

[Kandem]

I'm beginning to lose hope . . . I have a similar situation but I think the only solution might be to replace the whole thing. Unless someone can save us both

Maybe try the crown 2? Uwell Crown 2 Sub Ohm Tank

 

[J.D. Merchant]

Update to this thread.
When my tank was manufactured a runner o-ring/gasket was left out. The item is placed in the housing directly above where the coil meets with the housing. There's a slight lip that enters the very top of the coil and the rubber o-ring/gasket seals between and around this mating area. Once installed I've had no more problems. Looked through the rebuild kit until I found a rubber washer that wasn't even in it originally from the factory. Oh well mistakes happen, just glad that's figured out. Peace

 

[JMC17]

I received the Uwell Crown and the new mod I purchased last week.
I left it in hot water for 30mins, then dried it with room temperature air.

I primed the 0.25ohm coil by dropping ejuice in the center of the atomizer until soaked.
I filled it from the bottom with pure VG ejuice and had no trouble doing so at all, just make sure you don't overfill it.
As usual, I gently tightened it without force.

Great cloud production, great flavor and no leaks.
I'm really sorry that I cannot help you any further.
I find that the best way to fix a problem is to thoroughly investigate it.
Figure out where it leaks and why, use water to find where the leak is.

Update to this thread.
When my tank was manufactured a runner o-ring/gasket was left out. The item is placed in the housing directly above where the coil meets with the housing. There's a slight lip that enters the very top of the coil and the rubber o-ring/gasket seals between and around this mating area. Once installed I've had no more problems. Looked through the rebuild kit until I found a rubber washer that wasn't even in it originally from the factory. Oh well mistakes happen, just glad that's figured out. Peace

Oh! Looks like we were replying at the same time, what are the odds!
I'm glad you finally got it to work, hopefully other people will realize that most leaks are either caused by the o-rings or the atomizer's thread.

It would be nice if there was a drawing of where exactly each rings goes, that way people could more easily figure out what's missing.

 

[Cheallaigh]

btw, technically the toptank mini can be a top or bottom fill... but top filling is easier and less messy.

 

[Road King]

I primed the 0.25ohm coil by dropping ejuice in the center of the atomizer until soaked.

I would make sure NOT to put juice down the center hole on the top of the coil. That's how you get popping, gurgling, spitback & possible leakage. Only put the juice on the cotton part of the coil when priming. Be patient, as it takes awhile to soak in & you can add more. These coils love a generous amount of juice when priming them. I really like my Crowns tanks.

 

[Baditude]

Thanks for taking the time to reply but VG is thinner than PG so it being thinner would make it more prone to leak.

I think you got it backward! I must insist, I have two liter bottles of pure PG and VG, you can tell the difference just by shaking it. PG shakes very well, much like water. VG on the other hand is a viscous liquid and will not shake very well, very thick!
VG and PG Explained

As JMC17 said, you have it backward. Vg is thicker, Pg is thinner.

I'm glad you figured out the problem. I've been using my Crown 1 tank for several months now and never had a leaking problem. I use mostly high Vg juice. I fill from the top. Make sure when adding liquid to the tank that you close off the air control ring. I also only prime the coils where I can see white cotton, I never put liquid directly into the center of the coil -- that will cause flooding.