Innokin iSub B Replacement Tank

The Innokin iSub B is a 2ml TPD-compliant sub-ohm tank built from stainless steel and Pyrex glass, running Plex3D mesh coils at 0.35Ω between 30 and 55W. Sixth generation of the iSub series.

Micro-grooves cut across the mesh boost surface area for stronger flavour at lower power. Four-point adjustable airflow at the base lets you set the draw from restricted to wide open. Twist the top cap to fill.

An automatic flood shield helps prevent juice from flooding the coil while you pour. Pirate Vapes carries the iSub B with fast, age-verified UK delivery. 

Why vapers choose this:

• Plex3D micro-groove mesh coils are designed to wick high-VG e-liquids efficiently within the recommended wattage range.

• Four-point airflow lets you adjust the draw from restricted direct-to-lung through to a more open direct-to-lung inhale.

• Automatic flood prevention helps reduce flooding during refills. The cleaner first draws after topping up.

• Compatible with the full Innokin iSub coil range. You are not locked into one option.

• Durable stainless steel and Pyrex glass construction built to handle regular use.

Innokin iSub B Replacement Tank Features

Plex3D Mesh Coil Technology

Micro-grooves cut perpendicular across the mesh surface. More surface area touching your juice means stronger flavour between 30 and 55W. The coil heats up and cools down quickly, and the Plex3D design is intended to improve flavour output and coil longevity. Wood pulp mixed into the cotton wicking creates capillary action that keeps pace with chain vaping. 

Automatic Flood Prevention

Unscrew the top cap, and a spring-loaded piston closes off the juice channels. Fill without worrying about liquid flooding the coil and dripping out of the airflow slots. Screw the cap back on; the piston lifts; wicking resumes. Old-school problem, genuinely clever fix from Innokin's engineering team. 

Four-Point Adjustable Airflow

The base ring has four precision-cut air slots. Wide open delivers unrestricted lung draws with solid cloud output. Tighten the ring progressively, and the draw restricts, giving you a range of direct-to-lung options from a single tank. Pirate Vapes stocks this for DTL vapers who like being able to dial in their airflow without swapping hardware. 

Organic Cotton and Wood-Pulp Wicking

Innokin blends organic cotton with wood pulp inside the Plex3D coils. The wood pulp creates capillary action, pulling juice into the mesh faster and more evenly than cotton alone. This helps maintain consistent e-liquid supply to the coil, even when running thicker juices through the tank. Top up before the glass runs low, and the coil will thank you for it. 

Twist-to-Open Top Fill

No sliding mechanisms. No press-fit caps that pop loose in a pocket. Turn the top cap anti-clockwise; it unscrews. Pour juice down the side of the chamber, avoiding the centre airway. Firm, deliberate, and the threading keeps it secure once tightened. The Pyrex glass sits recessed into the base section, sealed with an O-ring for added stability during refills. 

Innokin iSub B Replacement Tank Colour Options

No flavour variants on this one because you fill it yourself with whatever juice suits you. The choice here is colour.

#buttons

• Blue
• Black
• Gunmetal
• Stainless Steel

Certain colour variants feature a rainbow-tinted Pyrex glass section that catches light at different angles. This is listed in Innokin's official product specifications and noted in multiple hands-on reviews, though the effect varies between finishes. Check which colours are currently available in the Vape Tanks collection.

How to Set Up the Innokin iSub B Replacement Tank 

1. Unscrew the top cap by twisting it anti-clockwise. The flood prevention piston will close the juice channels automatically.

2. Pour e-liquid slowly down the inside wall of the glass, avoiding the central airway. Avoid overfilling the tank.

3. Tighten the top cap back on securely. The piston lifts and wicking begins.

4. Leave the tank standing upright for five minutes. Seriously. The coil needs time to soak, and vaping a dry Plex3D coil will ruin it on the first draw.

5. Attach the tank to any compatible 510-threaded mod capable of 30 to 55W output.

6. Adjust the four-point airflow ring at the base to your preference, then vape.

What's in the Innokin iSub B Replacement Tank Box

• 1x Innokin iSub B Tank (with 0.35Ω Plex3D coil pre-installed)

• 1x Spare Plex3D Coil (0.35Ω)

• 1x Vape Band

• 1x Spare Glass Section (4ml bubble glass in some versions)

• 1x Spare O-Ring Set

• 1x Quick Start Guide

No mod, no battery, no juice. Just the tank, two coils, and the bits you need to keep it running. Grab a bottle of your usual e-liquid and a compatible mod if you do not already own one.

Fits Any 510 Threaded Vape Mod

One tank. One thread. No cross-compatibility headaches. The Innokin iSub B uses a standard 510 connection, so it threads onto any regulated mod capable of outputting 30 to 55W. Check your device specs before ordering if you are unsure. On the coil side, the iSub B is compatible with the full Innokin iSub coil range, not just the Plex3D.

That includes the older 0.5Ω and 2.0Ω iSub heads if you want to experiment with a different draw. The iSub B is designed for use with compatible regulated devices. Browse our Vape Mods for devices that pair well. 

About Innokin

Innokin has been building vape hardware since 2011. The iSub tank series is one of the most recognised lines in the industry, and the iSub B is the sixth generation. What keeps people coming back is consistency. Clean machining, reliable 510 connections, and a coil platform that works across the full iSub range.

The Plex3D mesh coils brought micro-groove technology to the iSub line, focusing on better flavour output at lower wattages. Innokin's replacement Vape Coils are sold separately in packs of five, so long-term running costs stay manageable. A dependable name in vaping hardware. 

Stock Up and Save

Grab a spare coil pack alongside the tank so you have replacements ready when needed. Pirate Vapes packs every order carefully, using secure packaging to help ensure glass tanks arrive safely.

Checkout is age-verified 18+ delivery only, and all products comply with TPD requirements and MHRA regulations. Free Pirate Post is available on orders over £25. The Crow's Nest also allows you to schedule regular deliveries of coils and e-liquid with savings included.

Conclusion

The Innokin iSub B is a solid, no-fuss sub-ohm tank built for DTL Vapers who want decent flavour without running coils at 80 or 90W. Plex3D mesh at 0.35Ω, four-point airflow, automatic flood prevention during fills, and a 510 thread that fits any compatible regulated mod.

Two coils in the box get you started, and the full Innokin iSub coil range is backwards compatible. Hard to argue with that at this price. Grab one from Pirate Vapes with fast, age-verified UK delivery. 

FAQs

What coils does the tank use?

Plex3D 0.35Ω mesh coils come in the box. But the tank also works with the full Innokin iSub coil range, including the older 0.5Ω and 2.0Ω options. You are not stuck with one coil type.

What wattage should I vape it at?

Plex3D coils run best between 30 and 55W. Start around 35 to 40W and adjust from there. Going above 55W will burn the coil out faster than it should.

Can I use nic salts in this?

It is a sub-ohm tank at 0.35Ω, so nic salts at high strength (10mg or 20mg) will likely be too harsh. Stick to freebase e-liquid or low-strength salts. High-VG juice pairs well with the Plex3D wicking system.

Does the glass break easily?

The tank uses Pyrex glass and includes a spare replacement glass section in the box. A silicone vape band is also included for added protection.

Will this fit my mod?

If your mod has a 510 thread and outputs between 30 and 55W, yes. That covers most regulated mods on the market. The iSub B is designed for use with compatible regulated devices.

How long does each coil last?

Depends on your juice and how often you vape. Sweeter liquids gunk the mesh faster. On average, one to three weeks per coil is typical. Clear juice tends to go longer.