Innokin as a brand needs little introduction but it has to be said I was a little surprised at the length of time they have taken to enter the sub ohm tank market. There have been numerous releases from competing brands in that time. But… Maybe the wait is worth it?
Innokin iSub Tank review
Innokin have released two versions of the iSub Tank, the polycarbonte (on review here) and the pyrex glass version, the iSub G.

So the best thing to do is jump straight into the Innokin iSub Tank review and see how it performs.

Before we do though there is a very important note to make regarding Sub Ohm vaping. While they offer a new way to vape they are not for everyone. Please take a look at our beginners guide to sub ohm vaping before you decide to buy!

This tank will also not work with a lot of standard e cigarettes due to them not being able to fire below 1.0 Ohm coils. This includes the MVP2 and Eleaf iStick 20W to name a couple. Be sure your device is compatible. The likes of the latest Proton mod by Innokin will work fine.

In The Box

Presentation is good in a compact box which includes the following:

  • iSub Tank
  • 2 X 0.5 Ohm coils (One pre fitted)

Build Quality and Looks of the iSub Tank

First impressions right out of the box I have to say are excellent. I personally love the clean solid looks of this tank with the most noticeable thing, when compared to other tanks, being the actual size.

It has a respectable 4ml capacity but the form of the tank looks nice and compact measuring approx 57mm from the base to the end of the drip tip (measured attached to the box mod). In the hand it feels lightweight yet robust even with the polycarbonate tank which comes with a frosted finish.

I know there will be many vapers out there that will find the PC tank a deal breaker, I don’t personally mind a PC tank in general and did actually use a tank cracking juice for this review which I will talk about more in the next section (vapour/flavor). The good news is though that Innokin are releasing the iSub G which is a 4.5ml pyrex tank.

As for how the tank looks sat on top of various box mods. The diameter is 22mm and it looked superb on a number of devices, unsurprisingly it looked great on the Innokin MVP3, the Eleaf 50W and sat well on the SMOK Xpro.

MVP 3 with the Innokin iSub

No Spill Coil Swap System Design

The way Innokin have designed the tank is also very clever and something I haven’t come across before. The tank comes in four parts, the PC tank – airflow base – Tank base – Coil. The main difference is the coil itself, it has been built with the 510 connection as part of the coil. The great thing is that this allows the coil to be replaced without having to take the tank itself apart. Even with a full tank you can replace the coil with no mess.

Innokin iSub Tank Parts

This works by unscrewing the airflow base and simply pulling the coil out. No unscrewing needed at all. A great feature that actually performs well in real world use and literally takes 30 seconds to do.

To fill the tank this works the same way as the majority of tank out there. Unscrew the tank from the base and fill from the bottom. When reconnected the tank only looks half full but the well surrounding the coil in the base is actually quite deep so half of the e juice is actually not visible.Isub Tank No Spill coil and base


The airflow uses two cyclops style holes on either side of the tank and can be opened/closed as you see fit. Its got a smooth action and has just the right amount of tension to make it easy to operate.

The different settings offer up a nice airy draw when opened up to good tighter draws almost fully closed, so much so it could be possible to vape mouth to lung although keep in mind it is made (like all sub ohm tanks) to be vaped direct to lung.

Overall up there with the better airflow designs I have tried.

Any problems with the build?

I found no problems as such but one thing that may be an issue for some is the fixed drip tip. Again not a big deal for me as I find the bore hole to be a good width to allow for a nice airy draw. For those with favorite drip tips then the pyrex glass version (iSub G) does have a removable drip tip.

Having said that when you look at the price of the iSub Tank, a removable drip tip for me is not too much of an issue!


The build is excellent, the PC tank will lose some vapers but I personally had no issues with this. The no spill coil swap design works a treat allowing you to change the coil even when the tank is full. Airflow function also performs well.

How Does The Innokin iSub Tank Perform?

As touched on previously the big thing with the Innokin iSub Tank is the polycarbonate tank. Innokin have gone for a German made material. Whether German made in this instance means better quality I couldn’t say.

Innokin have however sent their tank off for independent testing in the USA to check for the following;

The samples were submitted to test the chemical resistance of the German-made polycarbonate materials used in the iSub tank. The client wanted to demonstrate that the iSub tank would not crack or become discolored after use—specifically when used with acidic e-Liquids such as cinnamon and citrus flavors.

The test results showed the following:

The iSub tanks were inspected after each set of analyses on 4/21/15, 4/30/15, and 5/13/15. The tanks showed no signs of discolouration or cracking.

Now I’m not a scientist or qualified in anyway to tell whether these tests were sound but they were found on the Innokin website. The 25 puff test doesn’t sound much to me.

Anyway that’s the tests in lab conditions which I suppose is good to see Innokin undertaking to show the product working.

For me I don’t generally use tank cracking juices as my go to vapes although for this review I was using Punk Grenade by Riot Squad which is listed as a tank cracker on their website.

Now I can’t of course speak for all juices and maybe I was just lucky but after 5 days and a few refills of this juice the iSub PC tank is showing no ill effect. Take that for what you will, I am not saying this tank will not have issues with certain juices, just my experience!

As for flavor and vaopour volume I was very impressed with both when using with the MVP 3. The fruity, citrus flavor of Coup De’Tat was very clear and clean and was a pleasure to vape in the iSub Tank and the vapour volume produced was excellent.

iSub Tank With the MVP 3

The 0.5 Ohm Japanese cotton coils are recommended to be used between 20W-35W but this will change depending on the type and flavor of juice you are using so the sweet spot for you will differ to mine.

Innokin iSub Coil

I started off low at 10W and worked my way upto 30W. The citrus flavor at 10W was cool but flavorsome, at 15W things naturally warmed up a touch with the flavor still being excellent. For my personal tastes (with this particular juice) I found 20-22W was my preferred range.

Jumping to 25W-30W I found the flavor was to warm for my palette but as I say this could and likely will be different for you. I do after all prefer a cooler vape.


Flavor and vapour volume was very good. The PC tank had no problems for the ‘tank cracker’ juice I was using although I couldn’t say this will be the same for others.

Final Thoughts On The iSub Tank

The Innokin iSub Tank is a fantastic addition to the Sub Ohm tank offerings that have been so popular in 2015. The polycarbonate tank isn’t going to be for everyone although I had no issues with the tank cracking juice I was using. The no spill coil swap system is a great addition allowing you to swap out coils without pulling apart the main juice filled tank.

With top performance and a bargain price I can definitely see this one selling well and rightly so.

Lets break things down with the major points.

The Good

  • Very well priced
  • Great looking design with a build to match
  • Good introduction for vapers new to sub ohm vaping (Be sure to do more research into Sub Ohm if this is you)
  • No spill coil changing system works a treat resulting in no mess when swapping coils.
  • Airflow is smooth
  • Respectable 4ml capacity
  • flavor and vapour volume excellent

The Not So Good

  • Polycarbonate tank may not be to some vapers liking (The tank cracker juice I used had no issues though)
  • Drip tip is fixed
  • No rebuild-able deck as with some other sub ohm tanks
Jonny - Ecigclick

As the founder of Ecigclick, I've been vaping since 2010 and been cigarette free ever since. Ecigclick began with the aim to simplify & help smokers make an informed decision to make the switch to vaping. The Ecigclick team have personally tried and tested over 2000 products over the past 12 years. If you need help getting started vaping or just want to say hi then please feel free to get in touch. The team and I will help where we can!

Build Quality
Vapour Volume
As the founder of Ecigclick, I've been vaping since 2010 and been cigarette free ever since. Ecigclick began with the aim to simplify & help smokers make an informed decision to make the switch to vaping. The Ecigclick team have personally tried and tested over 2000 products over the past 12 years. If you need help getting started vaping or just want to say hi then please feel free to get in touch. The team and I will help where we can!
innokin-isub-tank-reviewVery impressed with the iSub tank from Innokin. I used 'tank cracking' juices and experienced no cracking so it appears they have produced a good quality material. For those that prefer a pyrex glass tank this is also available as the iSub G. I highly rate both and the price is great.


  1. Dont buy them they are garbage, i have gone through a 10 of them so far and the tube or (chimney) will break every time after a couple of months. They shitty tanks are blatantly made to break so you have to go out and buy another.

  2. I also find the chimney in the tank snapped off but bought a new one and had no trouble with it for weeks not noticed any problem with the plastic tank ie cracking and discolouring


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