Aspire Nautilus 3SR Replacement Tank 

Stainless steel build. Slide top-fill. Bottom adjustable airflow. The Aspire Nautilus 3SR is a 2ml MTL and RDTL tank built around one of the most trusted coil platforms in UK vaping.

It takes every Nautilus series coil Aspire makes, including the BVC range and the newer meshed options. Three interchangeable protective tank tubes with metal sleeves let you switch up the look while keeping the glass covered. 

Pirate Vapes stocks the Nautilus 3SR in Black, Silver, and Gunmetal, each one shipped as genuine with age-verified checkout across the UK. A solid tank for anyone already running a Nautilus setup at Pirate Vapes, or building a new one from scratch. 

Why vapers choose this:

• Eight compatible coils across the Nautilus range, covering everything from tight MTL to open RDTL.

• Slide top-fill that does not require removing the tank from the mod.

• Bottom adjustable airflow for precise draw control at every resistance.

• Three interchangeable protective tank tubes with metal sleeves for customisation and glass protection.

• MHRA-notified, TPD-compliant, genuine Aspire stock with age-verified checkout.

Aspire Nautilus 3SR Replacement Tank Features

Slide Top-Fill Without the Mess

Most tanks make you unscrew a cap to refill. The Nautilus 3SR uses a sliding top cap instead. Push it towards the red arrow, pour your juice in through the port, and slide it shut. The design helps reduce spills during refilling compared to full-cap removal. Quick, clean, and you do not need to take the tank off the mod.

Eight Coils, One Tank

This is where the Nautilus platform earns its reputation. The 3SR accepts every Nautilus series coil and the Triton Mini Clapton. That is eight different resistances from 0.3Ω up to 1.8Ω. Tight cigarette-style draw on the BVC 1.8Ω. Warmer hit on the 0.3Ω mesh. Browse our Vape Coils collection to find the resistance that fits your style.

Bottom Airflow You Can Fine-Tune

Rotate the AFC ring at the base, and the draw changes completely. Close it down for a proper MTL pull. Open it up for a restricted direct-to-lung inhale. The ring has enough resistance that it does not spin on its own in your pocket, which is a problem cheaper tanks never solve.

Three Protective Tubes, Three Looks

Each Nautilus 3SR ships with three interchangeable tank tubes fitted with metal sleeves. Swap between them to change the look without affecting performance. The metal sleeves provide additional protection for the glass compared with running an exposed tank.

510 Drip Tip, Your Choice

The drip tip is a standard 510, so if the included one does not suit your lips, any aftermarket 510 tip slots right in. The stock tip is comfortable enough for all-day use, but having the option matters when you are running the tank for hours. Pair it with your preferred juice from our E-Liquids Range.

How to Set Up the Aspire Nautilus 3SR Replacement Tank

1. Unscrew the base of the tank and press-fit your chosen coil into place.

2. Screw the base back on and attach the assembled tank to any 510-threaded mod. Finger-tight is enough.

3. Slide the top cap towards the red arrow mark to open the fill port.

4. Fill with up to 2ml of e-liquid through the port, leaving a small air gap at the top.

5. Slide the top cap back to seal. Leave the tank standing upright for five minutes so the coil wick soaks fully.

6. Adjust the airflow ring at the base. Tighter for MTL, looser for RDTL.

7. Fire and vape. If the first draw tastes dry or papery, wait another minute for the cotton to catch up.

What's in the Aspire Nautilus 3SR Replacement Tank Box

One Nautilus 3SR tank, two coils (a 1.8Ω BVC and a 0.3Ω Mesh), a 510 drip tip, a spare O-ring set, and a user manual. No mod, no battery, no e-liquid. You supply the mod and the juice. Box contents may vary slightly by region or retail package.

Fits Any 510 Mod in Your Collection

The Nautilus 3SR uses a standard 510 connection. That means it threads onto virtually every regulated mod on the market. No proprietary fittings, no adapter rings. Aspire built it alongside the Zelos M80, but at 24.6 mm in diameter, it sits flush on most mid-size Vape Mods and box mods without overhang.

Coil compatibility runs across the full Nautilus platform: Nautilus BVC 1.6Ω (7-11W), BVC 1.8Ω (10-14W), Meshed 1.0Ω (13-15W), Meshed 0.3Ω (23-28W), Nautilus 2 Coil 0.7Ω (18-23W), Nautilus 2S Coil 0.4Ω (23-28W), Nautilus 2S Meshed 0.7Ω (20-25W), and Triton Mini Clapton 1.8Ω (13-16W). Eight coils. One tank.

About Aspire

Aspire has been making vape hardware since 2013, and the Nautilus line is where most people first heard the name. The original Nautilus became one of Aspire's most recognised MTL tanks and helped popularise replaceable BVC coil technology across the industry.

Since then, Aspire has iterated through the Nautilus 2, 3, 3S, and now the 3SR, each time refining the coil platform and the build quality. The BVC (Bottom Vertical Coil) design they pioneered is still the backbone of the range. Pirate Vapes stocks Genuine Aspire hardware across our Vape Tanks collection.

Stock Up and Save

The 3SR ships with two coils in the box, but coils are consumables. How long they last depends on your wattage, juice sweetness, and how often you vape. Many users get one to two weeks per coil, though yours may differ. Keeping a spare five-pack means you will not get caught short mid-week waiting on a delivery.

Pirate Vapes dispatches every order tracked, packed carefully so your glass tank arrives in one piece. Checkout is age-verified, 18+ delivery only, and every product is TPD-compliant and MHRA-notified. Rather not reorder each time manually? The Crow's Nest posts replacement coils on a schedule with savings built in.

Conclusion

The Aspire Nautilus 3SR is a well-built, versatile MTL and RDTL replacement tank with a coil platform that gives you genuine range. Eight compatible coils from 0.3Ω to 1.8Ω, slide top-fill, adjustable bottom airflow, and a 510 connection that fits virtually any mod. Two coils in the box let you test both ends of the spectrum straight away.

If you are after a tank that does its job without fuss, the Nautilus 3SR earns its place. Grab one from Pirate Vapes with fast, age-verified UK delivery.

FAQs

Will this tank fit my mod?

If your mod has a 510 connection, yes. The Nautilus 3SR uses a standard 510 thread. At 24.6 mm in diameter, it sits flush on most mods without any overhang.

Do I need to buy coils separately?

Two coils come in the box: a 1.8Ω BVC for MTL and a 0.3Ω Mesh for RDTL. Replacement packs of five are sold separately when those run out.

What e-liquid works best with this tank?

Higher-resistance coils perform best with 50/50 PG/VG e-liquids or nic salts. The lower-resistance mesh coils can handle slightly thicker blends, but 50/50 is a safe starting point across the range. The UK Aspire Vendor recommends 50% VG as a baseline.

Is this the same as the Nautilus 3S?

No. The 3SR features a redesigned slide top-fill and interchangeable protective tank tubes with metal sleeves, while maintaining full compatibility with the Nautilus coil range.

How long does a coil last?

It depends on wattage, juice sweetness, and how often you vape. Many users replace coils every one to two weeks, but the actual lifespan varies. Replace it when the flavour drops off or it starts tasting slightly burnt.

Can I use this for sub-ohm vaping?

The 0.3Ω and 0.4Ω coils run in sub-ohm territory at 23-28W. It is not a cloud-chasing tank, but it handles restricted direct-to-lung draws well at those wattages.