Innokin Zenith 2: what this tank is worth
Looking up the Innokin Zenith 2 online means walking through a minefield. The Zenith range spans several generations, product listings mix figures from one market with figures from another, and a UK vaper can easily end up reading a tank capacity that will never arrive in the post. This guide sorts it out generation by generation, sticking to what the manufacturer and British retailers actually state.
Innokin Zenith 2: which generation are we talking about
The Innokin Zenith family has run across several successive models. The original Zenith opened the line, the Zenith Pro followed, then came the Zenith 2, also written Zenith II depending on the shop. A Zenith 2 Pro exists as well, more recent again.
Those near identical names do not describe the same tank, and that is exactly where the mistakes start. A wattage range read off a Zenith Pro listing has no reason to match the model of interest here. Everything below concerns the Innokin Zenith 2 in its standard form, never the Pro variant.
Holding on to that distinction removes half the unpleasant surprises before you have spent anything. When a listing stays vague about which generation it is selling, it does not deserve your trust, however professional the shop looks otherwise.
The Innokin Zenith 2 specification, figure by figure
Dimensions are the most stable data on any listing, because they do not shift with local regulation. Innokin gives a diameter of 26 mm for a height of 51.7 mm, which places this tank firmly in the wide category.
On a compact mod that diameter overhangs visually, and on a narrow device it creates a slight lip. It is worth checking before ordering, particularly if you intend to fit it to older hardware that was drawn around 22 mm atomisers.
Filling happens from the top by rotating the cap, with no disassembly needed to add liquid. British retailers describe an improved cap tolerance and a silicone seal on the fill port, both aimed at a cleaner refill. The pyrex tube lifts out completely, so a scratched or cracked glass can be replaced rather than condemning the whole tank.
On mouthpieces, the tank ships with two 510 push fit drip tips: a narrow one for a tight draw and a wider one for a more open one. Unlike the first generation Zenith, the riser has gone, so any off the shelf 510 mouthpiece fits without an adapter or an awkward gap.
The 5.5 ml trap and the real UK capacity
This is the widest gap between what you will read online and what you will receive. Innokin’s own material lists two configurations for this tank, 5.5 ml and 2 ml, and some British listings still carry the larger figure over from an international spec sheet.
Under the Tobacco and Related Products Regulations, every refillable tank and pod sold in the United Kingdom is capped at 2 ml. Any legally sold Innokin Zenith 2 here is therefore the 2 ml version, with no exception available. UK retailers who publish the specification properly, such as the shops listing it under vaping style MTL and DTL, state 2.0 ml plainly.
In practice that means more frequent refills than overseas reviews suggest, and it is worth reading any foreign video review with that in mind. It is not a flaw in the product but a legal framework that applies to every refillable tank on the British market, whatever the brand.
The same logic applies to the XL glass sold as a spare part. A taller bubble glass changes the silhouette, not the permitted capacity, so nothing sold here goes past the cap.
Z-Coil compatibility, the real strength here
The main asset of this tank is its coil ecosystem. Innokin states full Z-Coil compatibility, and several independent British sources agree: the same Z series coils are listed as fitting the Zenith, the Zenith II, the Zenith Pro, the Zlide and Zlide Top tanks, and the Coolfire Z60 and Z80 kits.
One exclusion is worth noting, because it catches people out. Retailers flag that Z coils do not fit devices built for Innokin ZF coils, which are a separate family despite the similar name. Check the letters on the packet, not just the brand.
That breadth has a very practical consequence: availability in British shops stays good years after the tank was released. A tank whose coils vanish from the market becomes an ornament, and that risk is clearly reduced here.
Box contents vary by market, and the detail matters. The tank is generally supplied with a 0.8 ohm Z-Coil aimed at mouth to lung use and a lower 0.3 ohm coil for restricted direct lung, with the wider Z range running from around 0.3 up to 1.6 ohm. Innokin notes that some markets substitute a higher resistance coil for the 0.3 ohm in the box, so check what your retailer actually ships.
Those wattage ranges are not decorative. Respecting them determines how long the coil lasts and how clean the flavour stays, as our guide to coil ohms and wattage explains in detail.
Setting the airflow, from tight MTL to RDL
The airflow ring combines two separate systems on the same collar. Small diameter holes serve the tight mouth to lung draw, while a wider slot opens the way to restricted direct lung. The ring sits at the base and adjusts by hand.
That design explains the versatility the brand claims. Closed almost fully, the draw is noticeably tighter than on earlier Zenith generations, whose openings were more generous. Switched onto the slot, the same tank changes register entirely.
The setting only makes sense paired with the coil fitted, though. A high resistance coil with the airflow wide open gives a hollow, thin vape, while a low resistance one with the airflow closed simply overheats. That pairing is set out in our article on MTL and DTL vaping.
Who this tank actually suits
The vaper who gets most out of this tank is the one still undecided about their style. Being able to move from a tight draw to a more open one by swapping a coil and turning a ring avoids buying two separate setups.
A vaper already settled on a very tight draw, by contrast, will find more compact tanks that are just as precise. The 26 mm diameter then buys nothing useful, since half the tank’s range goes unused. Our comparison of the best vape tank by vaping profile places this model against references pointed in other directions.
Frequently asked questions
What capacity is sold in the UK?
The compliant version holds 2 ml. The 5.5 ml figure that appears on many listings comes from markets outside the United Kingdom and does not apply to anything sold legally here.
Which coils fit this tank?
Innokin states compatibility with the whole Z-Coil range, shared with the Zenith, Zenith Pro, Zlide and Zlide Top tanks and the Coolfire Z kits. Innokin ZF coils are a different family and do not fit.
Which coils come in the box?
Retail listings describe a 0.8 ohm coil for mouth to lung use alongside a 0.3 ohm coil for restricted direct lung. Some markets swap the 0.3 ohm for a higher resistance option, so confirm with the seller.
Does it do a tight draw or an airy one?
Both. The airflow ring pairs fine holes for mouth to lung with a slot for restricted direct lung, and the result also depends on which coil is fitted.
Can I fit my own drip tip?
Yes. It ships with two 510 push fit mouthpieces, one narrow and one wide, and accepts any standard 510 drip tip, which was not true of the first generation Zenith.
The three things worth remembering
Three figures let you decide with your eyes open. The real UK capacity is 2 ml, compatibility covers the full Z-Coil range, and the airflow handles a tight mouth to lung draw as readily as a restricted direct lung one.
The rest is personal preference: that 26 mm diameter will please some vapers and irritate others depending on the device underneath. The Innokin Zenith 2 remains above all a transition tank, the one that buys you time to discover your style without buying twice. Just confirm which generation a listing is describing before you order, because the Zenith spec sheets resemble each other far too closely to skim.
Editorial content for adult readers only. Vaping products contain nicotine, a substance that causes addiction. Not for sale to under-18s in the United Kingdom. Guide Clearomiseur is an independent editorial title and this article is not a buying recommendation.
