Aspire K1 Plus Replacement Tank 

A 1.9ml Pyrex glass tank built specifically for Aspire's K1 Plus kit (and a fantastic top-fill upgrade for older K2 setups), and one of the simplest ways to keep an ageing Aspire pod-style tank running without buying a whole new kit. It uses Aspire's BVC (Bottom Vertical Coil) platform, ships with a coil already fitted, and fills from the top so you are not stripping the whole unit down every time you need a refill. 

Polished stainless steel housing, a genuine Pyrex tube, and a redesigned top-fill system make this a straightforward replacement for anyone whose original tank has cracked, clouded, or just worn out. Suited to MTL vaping. Stocked at Pirate Vapes for K1 Plus and K2 owners who just need the part, not a whole new kit. Over 18s only.

Why vapers choose this:

• A genuine like-for-like replacement for your K1 Plus, or a seamless top-fill upgrade for your K2 setup. No adapters, no workarounds. 

• Pyrex glass, not plastic. Holds up to stronger e-liquids and resists the clouding that plastic tubes develop over time.

• Comes with a coil fitted. You are not ordering the tank and then waiting on a separate coil order to actually use it.

• Top-fill design. Faster refills, less risk of spilling liquid down the side of the device.

• Genuinely compact. At 16mm across, it barely changes the feel of the device it is fitted to.

Aspire K1 Plus Replacement Tank Features

Why the Pyrex Glass Matters

Cheaper replacement tanks use plastic tubes that scratch, cloud, and occasionally crack under pressure from stronger e-liquids. Aspire fits this tank with a proper Pyrex glass tube instead, which holds its clarity for longer and copes better with day-to-day handling. Not glamorous, but it is the difference between a tank that still looks new after three months and one that does not. If you only need the tube itself, check Replacement Tank Glass before buying the full unit again.

Top-Fill, Finally

Older Aspire clearomiser tanks needed a full strip-down to refill: unscrew the base, remove the coil, fill from underneath. This tank flips that. Pull the mouthpiece, tip liquid in from the top, and you are done. Quicker, and less chance of e-liquid ending up somewhere it should not.

BVC Coils, Built In

The tank ships with a BVC coil already installed, Aspire's bottom vertical coil design that feeds liquid more evenly than older horizontal setups. That means fewer dry hits and a more consistent draw across the coil's lifespan.

Built for MTL, Not DTL

This is not a cloud-chasing tank. At 1.9ml capacity with resistances of 1.6ohm and 1.8ohm, it is designed for a tight, cigarette-style mouth-to-lung draw, the same style covered across our MTL Vape Kits range. If you are coming from a K1 Plus or K2 and want that exact feel back, this tank delivers it without any adjustment period.

Cross-Compatible Upgrades 

The K1 Plus tank is the native replacement for the K1 Plus kit. However, because it shares the legendary Aspire BVC coil platform and standard 510 threading, it also makes a fantastic top-fill upgrade for older K1 or K2 battery owners looking to ditch the old bottom-fill routine (just note there will be a tiny 1mm cosmetic overhang on a K2 battery).

Aspire K1 Plus Replacement Tank Colours and Resistance Options

The tank is stocked in one finish and two coil resistances, matched to which Aspire device you are running.

Clear is the only colour in the store picker: a fully transparent stainless steel and glass build that lets you see your e-liquid level at a glance.

On resistance, most buyers are replacing a tank for a specific device, so the choice makes itself. The 1.6ohm coil runs slightly warmer for a throatier hit, while the 1.8ohm coil gives a cooler, softer draw. Both are fully compatible with this tank, letting you tweak your MTL experience.

• Clear: Transparent glass and steel, visible fill level

• 1.6ohm: Warmer MTL draw

• 1.8ohm: Cooler MTL draw

How to Set Up the Aspire K1 Plus Replacement Tank

Straightforward swap. A couple of minutes, start to finish.

1. Remove the mouthpiece from the top of the old tank and unscrew the tank from the device base.

2. Fit the new tank onto the base, making sure the threading catches evenly before tightening.

3. Prime the coil with two to three drops of e-liquid through the top fill port, directly onto the visible cotton.

4. Fill the tank with your chosen e-liquid via the top-fill mechanism, stopping just below the max line.

5. Let it sit for six minutes before you take your first draw, longer if you have the patience, so the cotton has properly soaked through.

6. Start at low wattage on your device and take a couple of gentle draws before vaping normally.

What's in the Aspire K1 Plus Replacement Tank Box

One Aspire K1 Plus tank with a BVC coil already fitted, plus a printed user manual. No e-liquid, no device, and no spare coils beyond the one installed. If you get through coils quickly, it is worth picking up a separate pack of BVC coils rather than a new tank each time.

Native to the K1 Plus, Cross-Compatible with the K2. 

This tank is built natively for the K1 Plus and fits the K2 battery perfectly as a hardware upgrade. It is not designed to fit Aspire's Nautilus Range, the Cleito series, or the newer PockeX and Gotek pod systems, which each run on their own tank platforms. 

Wrong device, wrong part, however similar the branding looks on the box. Browse the full range of Aspire Vapes to find the correct tank or coil for your model.

About Aspire

Aspire has been building MTL-Focused Tanks and pod devices for over a decade, and the K1 and K2 lines sit firmly in that tradition: simple, low-wattage, cigarette-style vaping without menus or settings to fuss over.

The K-series was designed for vapers who want something that just works, rather than a device built around chasing bigger clouds. This tank continues that approach with the same coil family and fill logic, just refreshed with Pyrex glass and a proper top-fill system.

Stock Up and Save

Tank glass is one of those parts you do not think about until it cracks, usually at the worst possible moment. A spare on hand means you are never without a device while you wait for a delivery.

Pirate Vapes ships every order the same day before 4pm, in padded packaging that keeps glass tanks intact in transit. All stock is TPD compliant, checkout is age-verified, over 18s only.

Conclusion

The Aspire K1 Plus Replacement Tank does one job and does it properly: it gets your K1 Plus or K2 battery back in action without a whole new kit. Pyrex glass, a coil already fitted, and a top-fill system that saves you the faff of the old bottom-fill design.

Pick the 1.6ohm for a warmer draw or the 1.8ohm for a classic, smooth MTL vape. Check Vape Coils for spares once this one wears in, and browse Vape Accessories for the rest of your MTL setup. Find it at Pirate Vapes.

FAQs

Does this tank fit the K2?

Yes. While it is physically wider than the original K2 tank (16mm vs 15mm), it uses the same 510 threading and runs flawlessly using the same Aspire BVC coils. It’s a great way to add top-fill convenience to a K2 battery.

What is the e-liquid capacity?

1.9ml, just under the UK's 2ml legal limit for tank devices.

Can I use this with Nautilus or Cleito tanks?

No. It is built to run exclusively on the Aspire BVC coil platform. Nautilus and Cleito tanks use different threading and coil systems entirely.

How long does the coil last?

Aspire hasn't published a fixed lifespan for this coil. Most BVC coils run for one to two weeks under regular MTL use, depending on how sweet your e-liquid is and how often you vape.

Does it come with a coil already fitted?

Yes, one BVC coil is installed in the box, along with the user manual. No spare coils are included.

Is this suitable for sub-ohm or DTL vaping?

No. It is an MTL-only tank, built for a tight, cigarette-style draw rather than big clouds.