Table of Contents
- Introduction
- Identifying Your Tank Type
- The Essential First Step: Priming Your Coil
- How to Fill a Top-Fill Tank
- How to Fill a Bottom-Fill Tank
- Refilling Pod Systems
- Choosing the Correct E-liquid for Your Tank
- Battery Safety for Tank Users
- Troubleshooting Common Refilling Issues
- Maintenance and Long-term Care
- Conclusion
- FAQ
Introduction
Refilling a vape tank is one of the most common tasks you will perform as a vaper. While the process may seem straightforward, doing it correctly is essential for preventing leaks, avoiding burnt coils, and ensuring the longevity of your hardware. At Vapor Authority, we have helped thousands of adult vapers transition to high-quality equipment since 2013. Understanding the nuances of your specific device will help you get the most out of every drop of e-liquid.
Warning: This content is intended for adults of legal vaping age only. Vaping products contain nicotine, which is an addictive chemical. These products are not intended for use by minors, non-smokers, pregnant or breastfeeding women, people with heart conditions, high blood pressure, or asthma. Consult a physician if you have concerns about whether vaping products are appropriate for you.
This guide provides a detailed look at the various tank architectures and the specific steps required to refill them effectively.
Identifying Your Tank Type
Before you can add e-liquid, you must identify which type of tank you are using. Most modern hardware falls into three main categories: top-fill tanks, bottom-fill tanks, and pod-based systems. Each requires a slightly different approach to access the reservoir.
Top-Fill Tanks
Top-fill tanks are currently the industry standard due to their convenience and mess-free design. You do not need to remove these tanks from your mod to refill them. There are usually three ways to access the fill port on a top-fill tank:
- Threaded Top Caps: You unscrew the entire top piece (where the drip tip sits) to reveal the filling slots.
- Sliding Top Caps: These feature a hinge or a sliding mechanism. You push the top cap in the direction indicated by an arrow to reveal a silicone-sealed port.
- Button-Lock Tops: Common on brands like SMOK, these require you to press a small locking button before the top cap can swing open.
Bottom-Fill Tanks
While less common in new releases, many classic and "mouth-to-lung" (MTL) tanks utilize a bottom-fill design. To fill these, you must unscrew the tank from your battery or mod. You then invert the tank and unscrew the base (the part containing the coil) to access the e-liquid reservoir.
Pod Systems and Pod-Tanks
Pod systems use plastic reservoirs rather than glass tanks. Some are "open," meaning you can refill them, while others are "closed" and disposable. Open pods usually have a small silicone plug on the side or bottom that you pull back to reveal the fill hole.
The Essential First Step: Priming Your Coil
If you are filling a brand-new tank or have just installed a fresh replacement coil, you must prime the coil before filling the tank. Priming is the process of manually saturating the cotton wicking material inside the coil head.
The "coil" is the heating element wrapped in cotton. The "wick" is the cotton itself, which draws juice to the element. If you fire the device while the cotton is dry, it will burn instantly. This creates a "dry hit" that ruins the coil and produces a harsh, acrid taste.
To prime your coil, locate the "wicking ports"—the small holes on the side of the metal coil housing where the white cotton is visible. Apply one or two drops of e-liquid directly onto the cotton in each port. You should also add a few drops into the top of the coil, being careful not to over-saturate it. Once the coil is installed and the tank is filled, let it sit for at least 5 to 10 minutes before use.
How to Fill a Top-Fill Tank
Top-fill tanks are designed for speed. Because they fill from the top, they rely on a vacuum seal to keep the juice from leaking out of the bottom airflow holes.
- Close the Airflow: Before opening the top cap, rotate the airflow control ring at the base of the tank to the fully closed position. This helps maintain internal pressure and prevents juice from flooding the coil.
- Access the Fill Port: Unscrew or slide open the top cap. You will typically see two or three holes.
- Identify the Fill Port vs. the Chimney: Always look for the outer holes. The center hole is the "chimney" or "vent tube." This leads directly to your mouthpiece. Never put juice down the center hole, as it will cause immediate leaking and "spit-back" into your mouth.
- Insert the E-liquid Bottle Tip: Place the nozzle of your e-liquid bottle into the fill port.
- Fill Slowly: Squeeze the bottle gently. Watch the juice level through the glass. Fill the tank to about 90% capacity. Leaving a small air pocket at the top helps maintain the vacuum seal.
- Secure the Cap: Close or screw the top cap back on immediately.
- Open the Airflow: Turn the airflow ring back to your preferred setting.
How to Fill a Bottom-Fill Tank
Bottom-fill tanks require a bit more handling, but they are often very reliable and less prone to top-cap seal failures.
- Remove the Tank: Unscrew the tank from your mod.
- Invert the Tank: Turn the tank upside down so the drip tip is pointing toward the floor.
- Unscrew the Base: Hold the glass firmly and unscrew the metal base. The coil is usually attached to this base.
- Angle the Tank: Hold the glass section at a slight angle.
- Avoid the Chimney: Like top-fill tanks, these have a center tube. Pour the juice down the inside wall of the glass, ensuring no liquid enters the center chimney.
- Stop Below the Chimney Line: Do not fill the juice higher than the top of the center tube, or it will overflow into the chimney when you reassemble it.
- Reattach the Base: Screw the base back onto the tank while it is still upside down. Ensure it is finger-tight but do not overtighten.
- Flip and Reattach: Turn the tank right-side up and screw it back onto your device.
Refilling Pod Systems
Pod systems are highly portable and use a different sealing mechanism. Because they are often small, the fill ports can be narrow.
- Remove the Pod: Most pods are held in by magnets or a click-in mechanism. Pull the pod out of the battery section.
- Locate the Plug: Look for a silicone or rubber flap on the side or bottom.
- Open Carefully: Use your fingernail to lift the edge of the plug. Do not pull it so hard that it detaches from the pod entirely.
- Fill the Pod: Insert the bottle tip. Since pods are often tinted, you may need to hold it up to a light source to see the juice level.
- Reseal Firmly: Push the silicone plug back in until it is flush with the pod surface.
- Wipe Excess Juice: Use a paper towel to wipe any droplets off the exterior of the pod before putting it back in the device.
Choosing the Correct E-liquid for Your Tank
Not all e-liquids work in all tanks. The thickness of the juice is determined by the ratio of Propylene Glycol (PG) to Vegetable Glycerin (VG). At Vapor Authority, we only carry US-made e-liquids that use high-quality ingredients, but you must choose the right ratio for your specific hardware.
- Sub-Ohm Tanks: These use large coils with wide wicking ports. They are designed for "Direct-to-Lung" (DTL) vaping. They require thicker juice, typically a 70% VG / 30% PG ratio. If you use thin juice in these, they will likely leak.
- MTL Tanks and Pods: These use smaller coils with tiny wicking ports. They require thinner juice, usually a 50/50 ratio. High-VG juice is too thick for these coils to wick quickly, which can lead to dry hits.
- Nicotine Salts vs. Freebase: Nicotine salt e-liquids usually have higher nicotine concentrations (25mg–50mg) and are meant for low-power pods. Freebase nicotine (3mg–12mg) is standard for high-wattage sub-ohm tanks.
Battery Safety for Tank Users
If you are using a tank on a box mod with external batteries, safety is paramount. The tank and the mod work together, and a faulty battery can compromise the entire experience.
External Battery Care
- Inspect Wraps: Always check the plastic wrap on your batteries (such as 18650s). If there is a tear or nick in the wrap, do not use it. A damaged wrap can cause a short circuit against the metal body of your mod or tank.
- Use a Dedicated Charger: While many mods offer USB charging, it is safer to use an external charger designed for li-ion batteries. This ensures a more balanced and consistent charge.
- Never Carry Loose Batteries: Never put loose batteries in your pocket or bag. They can contact keys or coins, leading to a thermal event. Always use a plastic battery case.
- Avoid Overheating: If your mod or tank feels excessively hot to the touch while you are vaping, stop immediately. Allow the device to cool down and check your wattage settings to ensure you are within the recommended range for your coil.
Troubleshooting Common Refilling Issues
Even experienced vapers encounter issues like leaking or gurgling after a refill. Most of these problems have simple solutions.
Leaking After Filling
This usually happens because the vacuum seal was broken. Ensure your top cap is screwed on straight and that the silicone gaskets (O-rings) are not torn. If a tank leaks immediately after filling, you may have accidentally dripped juice into the center chimney.
Gurgling and "Spit-back"
A gurgling sound means the coil is flooded with too much juice. This often happens if you leave the top cap off for too long or if the e-liquid is too thin for the coil. To fix this, wrap a paper towel around the airflow holes and blow gently through the mouthpiece to clear the excess liquid.
The Burnt Taste
If you just filled your tank and it tastes burnt, the coil was likely not primed correctly, or you are vaping at a wattage that is too high for the coil's rating. Always check the "Recommended Wattage" range printed on the side of the coil head.
Maintenance and Long-term Care
To keep your tank performing like new, you should perform a deep clean every few weeks or whenever you change flavor profiles.
- Disassemble the Tank: Remove the coil and set it aside. Take apart the glass and metal sections.
- Rinse with Warm Water: Use warm (not boiling) water to rinse away old e-liquid.
- Check O-rings: Look at the rubber seals at the top and bottom of the glass. If they look flattened or cracked, replace them using the spares typically included in your original kit.
- Dry Thoroughly: Let the parts air dry completely. Water trapped in the airflow can cause popping and muted flavor.
- Lubricate the Seals: Before reassembling, put a tiny drop of e-liquid on the O-rings. This helps them slide into place without catching or tearing.
Conclusion
Knowing how to put juice in a vape tank correctly is the foundation of a good vaping experience. By identifying your tank type, priming your coils, and following a methodical refilling process, you can avoid the most common frustrations like leaking and burnt coils.
- Always close your airflow before filling a top-fill tank.
- Never put e-liquid down the center chimney.
- Prime new coils for 10 minutes before firing the device.
- Match your e-liquid PG/VG ratio to your specific coil type.
We invite you to explore our extensive collection of hardware and US-made e-liquids at Vapor Authority. Whether you need a new sub-ohm tank, replacement coils, or a fresh bottle of juice, our team in San Diego is here to ensure you receive 100% authentic products with industry-leading support. Learn more about our company on the About Us page.
FAQ
Why is my vape tank leaking from the bottom airflow after I fill it?
Leaking usually occurs because the internal vacuum was lost during refilling. To prevent this, ensure the airflow is closed before opening the top cap, and do not leave the tank open for longer than necessary. Also, check that your coil is screwed in tightly, as a loose coil allows juice to bypass the seals.
Can I mix two different e-liquids in the same tank?
Yes, you can mix e-liquids, provided they have similar PG/VG ratios. Many vapers mix flavors to create custom profiles. However, be aware that mixing different nicotine strengths will result in a strength somewhere in the middle, and the flavors may not always complement each other as expected.
How do I know when it is time to refill my tank?
You should refill your tank when the juice level drops below the visible wicking ports on the side of the coil. If the cotton wicks become dry while the device is firing, the coil will burn. It is better to top off your tank early than to risk a dry hit by waiting until it is empty.
Why does my vape "spit" hot juice into my mouth after I refill?
Spit-back occurs when the coil is flooded with too much e-liquid. This can happen if you prime the coil too aggressively or if you accidentally get juice into the center chimney during refilling. To fix it, fire the device for a second without inhaling, or flick the tank downward into a sink to clear the excess juice.
