WARNING: This product contains nicotine.
Nicotine is an addictive chemical.

WARNING: This product contains nicotine.
Nicotine is an addictive chemical.

Uwell Crown 4 IV Sub Tank

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Stainless Steel

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The Uwell Crown 4 Tank is the latest subohm tank from the Crown Tank series. Introducing a patented self-cleaning technology, the Crown 4 Tank atomizers can absorb the e-liquid in the condensation holder through regular usage and vaporizer it, reducing juice leakage and manual cleaning. The Uwell Crown 4 Tank is designed with a 6ml tank capacity with its pre-installed bulb glass, threaded 90 degree screw off top-fill system, and utilizes exclusive Uwell coils. The Uwell Crown 4 Coils utilizes Stainless Steel 904L (steel commonly used in luxury watches) with results in better flavor and longer lifespan. With Pro-FOCS Flavor Testing Technology, Uwell guarantees the perfect flavor profile for a satisfying vape. 


  • 25.7mm diameter
  • Tank capacity: 6ml (bulb) / 5ml (standard)
  • Patented self-cleaning technology (no leaking)
  • Threaded top-fill system
  • Utilizes exclusive Uwell coils
  • Bottom adjustable airflow control
  • 510 threaded
  • 1 x Uwell Crown 4 Tank
  • 1 x Crown 4 Dual SS904L 0.4ohm coil (pre-installed)
  • 1 x Crown 4 Dual SS904L 0.2ohm coil
  • 1 x Spare glass (5ml standard)
  • 1 x Pack of replacement o-rings
  • 1 x Drip tip cover

Customer Reviews

4.7 Based on 18 reviews
5 ★
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I recommend this product

One of the best

I love this tank simply because it’s never leaked on me, even on its side. I have 2 of these in my collection now and will likely get another. It’s great on the geek vape aegis mini since it’s safe on its side unlike my other tanks which may leak a tad. I use the UN2 coils I got here and they are great. I prefer how it opens vs how most just slide open now, I’ve never had issue refilling either since there is no need for some silicone band around the fill holes. Definitely recommend and looks good to boot! Would like to see a dual coil for this though.



everything about this tank is great!


I'm Liking It So Far....

Really just trying to find the tank I love the best. This is a very well made and decent tank. Quality of coils and taste however ranges for me. The fruits are good in this tank but for me does nothing for my creams deserts flavors...I recommend this tank but try some others first.

Leslie P.
United States


oh yeah! :) this is a keeper! great flavor!! I will buy several of them.

gerald furnari

Crown proves worthy of the throne.

I have been using Uwell products since day one. Like every other manufacturer out there they have had their ups and downs. The Crown 4 doesn’t leak. It just doesn’t. That alone should rank it 5 stars. A dependable workhorse of a Sub-Ohm tank, it’s construction is like Tony Stark’s armor: impenetrable. The only drawback, it runs hot at higher temperatures and has yet to have full mesh coils as of this review. ( however don’t worry I have put some real coil killer juice high in sugar content and the coils have survived for quite a long time )

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