Rebuildable atomisers let you wrap your own coils and wick them with your own cotton, instead of buying pre-made heads. There are three main types, and the letters tell you which: dripping, tank, or both. Here is how each works, the kit you need and the safety rule you must learn first.
The short version
- RDA: rebuildable dripping atomiser. No tank, you drip liquid onto the cotton.
- RTA: rebuildable tank atomiser. A deck inside a tank, like a normal tank.
- RDTA: the deck sits on top of the tank, with the wicks dipping into it.
- You need an ohm reader, Ohm's law and a regulated mod to start safely.
What a rebuildable actually is
A normal tank uses a factory-made coil head: wire and cotton sealed in a metal sleeve that you throw away when it wears out. A rebuildable replaces that with a build deck, a platform with posts where you fit your own coil and thread your own cotton.
The appeal is control and cost. You choose the wire, the resistance and the wicking, so you can fine-tune flavour and vapour. Once you have the tools, a coil change costs pennies in cotton.
The trade-off is effort and responsibility. You are building the electrical heart of your vape, so you need to understand what you are making. That is why this is not a starting point for brand new vapers.
The three types side by side
An RDA has no tank. You drip a few drops onto the cotton, take several puffs, then drip again. Flavour is often superb because the vapour path is short, but it is not ideal for vaping on the move. Some RDAs have a bottom feed pin for squonk mods, which push liquid up from a bottle in the mod.
An RTA puts the deck inside a tank, so it works like the tank you already know, just with your own coil. An RDTA stacks the deck above the tank, with long wick tails dipping down into the liquid.
The comparison sums up the differences.
Safety first: your build and your battery
When you wrap your own coil, you set its resistance, and that decides how many amps it pulls from the battery. On a regulated mod the chip protects you by refusing resistances that are too low. On an unregulated mechanical mod, nothing does.
Always measure a new build on an ohm reader or your regulated mod before firing. Check the current with Ohm's law and keep it well inside your battery's continuous discharge rating. Our guide to Ohm's law for vapers has a calculator.
Use genuine cells from our 18650 range and replace any battery with a torn wrap.
Your first build, step by step
Pre-made coils, sold ready-wrapped, take the hardest part out of your first build. You only need to fit, adjust and wick them.
The sequence below is the general shape of any single coil build. Every deck is a little different, so read your atomiser manual for post layout and leg length.
Patience matters most at the pulse stage. Fire in short bursts and watch the coil glow from the centre outwards. Hot spots, bright patches that glow first, mean the wraps need nudging closer together with a ceramic tool before you add cotton.
- Fit the coilInsert the legs into the posts and tighten the screws.
- Trim the legsCut the excess wire close to the posts.
- Check resistanceRead it on your mod and confirm it is stable and safe.
- Pulse and adjustFire briefly with no cotton and fix any hot spots.
- Wick itThread cotton through, trim and tuck the tails.
- Prime and testSoak the cotton, close up and fire at low power.
The kit you need
You do not need a toolbox the size of a suitcase. Most rebuilders start with a small kit and add pieces over time. Plenty of atomisers include a screwdriver, spare screws and a coil jig in the box.
Organic cotton made for vaping is the most important consumable. Our cotton and wick range has options made for rebuildables. Our guide to cotton and wicking basics covers how much to use.
Two tools are worth buying even if your atomiser comes with extras: decent flush cutters, which leave clean coil legs, and ceramic tweezers, which let you squeeze a hot coil without conducting heat or shorting anything. Tick off the essentials before you start.
Quick check
Rebuilding is rewarding, and many vapers find it becomes part of the hobby. Start with a single coil RTA or RDA and pre-made coils, learn to wick well, and build from there.
Wire choice is the next rabbit hole. Different wires suit different modes, and some can be used in temperature control while others cannot. Our guide to Kanthal, nichrome and stainless steel explains the options.
Keep a notebook of your builds while you learn: wire, wraps, resistance, wattage and how long the cotton lasted. Patterns jump out after a few weeks. One question to make sure the basics stuck.
Which rebuildable has no tank and needs liquid dripped onto the cotton?
Quick answers
What is the difference between an RTA and an RDA?
An RTA has a tank around the build deck. An RDA has no tank, so you drip liquid straight onto the cotton.
Are rebuildables good for beginners?
They are best once you understand Ohm's law and battery safety. Start with a regulated mod and pre-made coils.
Are rebuildables cheaper than coils?
Usually, yes. Once you have the tools, cotton and wire cost far less per change than pre-made heads.
How big can an RTA tank be in the UK?
Like all tanks, a maximum of 2ml.
