~~~~ I have not had any leaking problems on any of my Ithakas ~~~~
Ithaka is very very easy to configure, the thing is start with a basic configuration and then move on to play with other "more advanced" functions or characteristics.
I'm just trying to share my thoughts and I can be totally wrong.
I'm not trying to cover all the possible configurations.
Ithaka leaking on connector area:
1.- Around center post (O-Ring is not sealing properly against the base).
2.- Through center post (air intake).
Possible causes:
1:
- Damaged O-Ring.
- Center post not aligning properly.
- Ceramic assembly not tighten enough (center post o-ring can not seal properly).
- Loose center post.
2:
When level of liquid in the tank is higher than the center post top nut and:
=== Center post top nut is in "closed" position*: ===
*New nut does not has an "open" or "closed" position, it is always in the "open" position
--Notice the old center post top nut is much taller, so it could help prevent the leaking through the center pin (air intake)--
-Thin wicks-
(basic liquid control in open position)
Liquid has free flow to the the small collector tank, as there is some space left by the wicks in the ceramic channels (gap), and basic liquid control slots are feeding the wicks (or the gap in the ceramic channels left by the wicks):
Eventually the small collector tank will become full of liquid, the liquid will then enter into the ceramic cup (through slots on basic liquid control and the gap left by the thin wicks in the ceramic channels) flooding it, finally the liquid will flow out through the center post (air intake), or through the mouthpiece.
If you are refilling, you keep filling, it will keep leaking.
If tank is closed, it doesn't matter, because there is a free path by which the liquid can flow out.
-Basic liquid control is in closed position-
After filling the tank and you open the mouthpiece, same behavior will occur, basic liquid control is closed but mouthpiece will open the "liberty path".
=== Center post top nut is in open position: ===
-Thin wicks-
Basic liquid control is open, mouthpiece is closed:
Liquid has free flow to the the small collector tank, through the basic liquid control and the gap left by the thin wicks in the ceramic channels.
While refilling, eventually the small collector tank will be completely filled, liquid has free access to the ceramic cup (by the bottom), as the center post top nut is in open position. If you keep filling, the liquid will then travel out through the center post (air intake) until you stop filling and until the liquid level inside the tank is below the top of the center post top nut (pressure balance).
Basic liquid control closed, mouthpiece closed (while refilling or after refill), no leaking should present (in theory), all paths through which the liquid could flow are closed, although all depends of the pressure and liquid density.
-Normal wicks-
Basic liquid control opened or closed.
No gaps left by the wicks in ceramic channels.
There is not a "free path to liberty".
After filling the tank, if the mouthpiece is opened too much, the excess liquid will enter inside the ceramic cup, as the center post top nut is configured in open position (or the new nut is used), liquid will enter into the small collector tank -through the ceramic cup insider notches-, if the small collector tank gets filled and the level of liquid still higher than the center post top nut, liquid will travel out through the center post (air intake).
Sometimes liquid flows out through the center pin (air intake) after or while closing the tank -while screwing the small tank top nut-, as we are pushing air inside the tank, the air pressure created inside will force the liquid to flow out through the easiest path, for example: through the slots of basic liquid control, to the ceramic cup channels (even when ceramic channels are filled with silica).
Of course, when atomizer is in vertical position liquid will flow out through the center pin inner hole, and when the atomizer is headlong the liquid could flow out through the mouthpice.
Liquid quantity (and viscosity) also play an important factor, as an example check this configuration:
* 3mm wick is used (ceramic channels are sealed with wick).
* Ithaka is configured in big mode (one or two additional upper bodies).
* Basic feeding control is in open position (it does not matter if it is configured to feed 4 channels, two channels, etc).
The pressure of the liquid on a full tank (and the air pressure when closing the tank) will force the liquid to travel out, you will notice it will stop leaking when the inside pressure is equal to the outside pressure.
That will not happen when the basic feeding control is configured in "closed position", because, the only path by which the liquid can flow is through the wicks, when we open the mouthpiece. Note we are using the appropriate wick size, so it will prevent the liquid to freely flow upwards the ceramic channels and downwards the ceramic channels to the small collector tank, even when the mouthpiece is opened a little. The proper wick size somehow compensates or holds the pressure.
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Always start with a basic configuration:
* 3mm wick.
* One turn of NR wire around the positive post is more than enough (more turns could lead to an o-ring deformation or to an off center center pin -improper sealing-).
* Do not over tight the ceramic assembly (it could lead to a o-ring deformation or to an off center center pin -improper sealing-)
* If you have installed the old center post top nut, configure it in closed position.
* Always trim the wicks before the positive o-ring (wick could get trapped between the positive o-ring and the base)
* Basic liquid control closed.
* Configure Ithaka in normal mode or in mini mode* (*if you have a Odysseus short mode mouthpiece or the new telescopic mouthpiece).
* Fill the tank with liquid.
* Slowly screw the small top cap nut (allows some pressure release).
- Play with the same above configuration but opening the basic liquid control (in 4 channels, 2 channels, etc.) and play advanced liquid control (mouthpiece), see how it works.
- If liquid is too thick, play with basic feeding control and advanced feeding control, install a thinner wick (2.5mm) and see how it works.
- Experiment with the center post top nut configured in open position and closed position (new small nut is always in open position).
* If you configure your Ithaka in medium or big mode, I recommend to configure the basic liquid flow control in closed position.
All is about a lot of factors, liquid viscosity, pressure, size of wick, controls configured, even when everything is configured right, if the joints on the wire are to big (manual joints) it could lead to problems, mood of user, divine inspiration.
While vaping the liquid gets evaporated, air has to enter inside the tank to replace the evaporated liquid. There is always a small air bag inside the tank, even when we fill the tank to its max capacity. As while vaping we move the atomizer in different positions, that air bag and liquid moves inside the tank and more air will eventually enter through the top of the center post, it will find its way to the tank to balance pressure.
Ithaka leaking at tank sections or at the base:
In my personal experience with 7 Ithakas (I have two, and the others are of friends). The default o-rings used to seal tank sections (16mm diameter x 1mm thick) work perfect, what I have seen is that there could be very tiny tolerance difference on the machining between Ithakas (in the order of 0.0x), those differences are absorbed by the o-rings, I have been experienced a leaking tank section only one time, it was due that specific tank section (top cap) was not tight enough to the next section (upper body), it moved a little while I was adjusting the liquid control, as the small top cap nut was very tight.
The solution in my case was to tighten properly the tank sections (of course, I do not mean it should apply to everyone having the same issue). I tighten the tank sections enough, so no o-rings are visible between each tank section.
I have noticed that the tank section with looser fit, is the engraved ring / base, although none of the Ithakas I have configured has presented any sign of leaking at that place.
I was thinking what will be better to solve the leaking tank sections problem:
Is it better to use a bigger diameter o-ring (as 17mm ID x 1mm CS)?
Or could it better to use a smaller diameter but thicker o-ring (as 15mm ID x 1.5 CS)?
Please excuse my bad english / redaction.