The Revvo tank is almost too easy to maintain, to disassemble and reassemble is merely unscrewing or screwing the various parts, the coil can be changed even when there is liquid in the tank.
No one has yet produced such an innovative replaceable coil for a tank until now, except of course, Aspire. The fantastic all new coil design, the ARC, 'Aspire Radial Coil' which sits horizontally in the tank similar to a 'stove-top' design. Of course the real trick in the design is the increased surface area of the coil for great flavor and great vapor production, made using Kanthal material and rated at 0.10-0.16ohm.
Filling your new Revvo through the centre of the tank, in which sits a spring loaded filling tube. The spring of the tube is soft enough to allow even slight pressure from almost any type of bottle/glass dropper to open it, but strong enough to create a leak proof seal when released after filling.