It's with great regret and a certain amount of trepidation - that today I have temporarily banned my wife from using her billet box.
When I first acquired it for her - I noticed after a day or two of juice in the tank that I could detect a faint taste of nitrile rubber. I surmised that the nitrile rubber ball used to refill the tank was possibly leaching chemicals into the juice itself and as a by product the vaper would then be heating and inhaling heated nitrile components -
not good!
I also penned my point here. However my wife stated that she couldn't taste it herself - so I let her carry on regardless.. turns out that was a big mistake...
This evening she came to me and asked me if her juice tasted a little
"rubbery; like a water bottle smells"
I had a vape and it was
VILE. It was like vaping tyre rubber flavoured juice - her particular juice in that tank was grape and banana and I have it in another standard carto tank - there was no comparison taste wise - the BB tank tasted like rubber!
She has another BB tank that had apple pie in it - when compared to a standard carto tank again there was no comparison but the BB apple pie only had a faintly detectable nitrile note - it was there though and detectable and did not compare to the standard carto tank. Obviously it was being more successfully masked by the more potent apple pie flavoring.
Boge carto's from the same batches used throughout..
I immediately banned her from using it - I am not letting her continue to vape from these tanks until I have sorted out this - I am not comfortable with her vaping what I inhaled tonight on a daily basis. We've done the research on all the other chemicals that are a necessary prerequisite of this "hobby" that cannot be avoided and we have come to a decision to risk those - but I have control over this and it is
There and
detectable.
I'm having a hard time believing that I am the only person who owns a Billet Box to have noticed this? Maybe other owners use juice that is so strong in flavour and nicotine content for it to be undetectable? But trust me - It was there- I offered it to 4 other vapers and their faces and reactions confirmed my findings also.
Maybe only certain flavours have the potential to dissolve the nitril ball - even so if the potential is there for that to happen design changes should be implemented!
I don't want to give up on this device just yet - I will first attempt dismantling it removing the ball and spring and implementing a silicone bung for the time being as a plug to see if that cures the problem. If that doesn't work
(and I see no reason why it shouldn't) I will unfortunately have to sell the device as I will not allow the missus to potentially harm herself through it's use...


Vapian - I've done everything you've suggested and yes it more or less confirms that something is leaching into the juice in the tank..
It tastes just like rubber - well not that I've ever eaten rubber - but it tastes exactly like a new hot water bottle smells when unpacked for the first time. Boge cartos are what's being used at the moment and I've had boges in use for over a year now - I've had them go bad on me and they've never tasted like this - not with this particular aroma and taste.
I know that nitrile is GRAS but unsure for prolonged exposure to these chemicals - PG is a alcohol of sorts and certain flavours are known to affect certain plastics so it's not a stretch to believe they may affect the nitrile too..Nitrile can be quite sacrificial when exposed to certain chemicals - I've seen what happens to it when exposed to brake fluid it softens it and eventually will melt it or at the very least makes it soft enough to disintegrate from light pressure - remember that di-ethylene glycol (brake fluid) is a close cousin to PG ....
-
Silicone is a much superior material for chemical resistance - which is probably why the Chinese use it in their vivi nova's kanger bottom fed etc.... Viton rubber would be perfectly acceptable too as it has a much better chemical resistance than simple nitrile rubber..
It is indeed puzzling and not something I would expect. And the lack of other owners mentioning it seems to indicate it is peculiar to this particular set of circumstances - but everything I have tried to eliminate factors here always point to the BB tank as the causal factor - the self same juices do not have the same effect when used in standard carto tanks for long durations using EXACTLY the same cartomisers or indeed in any other atomiser - spheroid - taifun - dripper - prometey etc...
it's occam's razor - the simplest solution would seem to indicate that the problem lies within this house - but by the same token by eliminating everything else here as much as possible the simplest solution always points to the tank time and again...
It probably does not occur in standard carto tanks because very little of the nitrile sealing o-rings ever gets exposed to the juice whereas in the design of the billet box tank quite a lot of that ball is exposed for a much larger surface area for a more prolonged and consistent time.
this tank is the only design I've come across that exposes quite that much nitrile to liquid on a prolonged basis - in order to eliminate the ball I have to remove it and test without it there - it's the only way to successfully eliminate it or substantiate it as a causative factor really.
I've considered it may be a particular flavour but it occurs with nearly any flavour put into the tank to varying degrees - certainly the particular recipe I make up definitely seems to amplify it's effect. I've tested it methodically ensuring that my taste buds aren't already contaminated and I have always detected a faint odour and taste of rubber from the tank no matter what flavour was in it. Like I have already mentioned the wife never actually detected it until now.
I have tried all manner of drip tips to eliminate them - stainless - ceramic - acrylic etc.. - would never use a nitrile drip tip - eww !!
Note that it's not happening with a fresh tank and fresh juice fill -- it definitely occurs after a days duration or so - so it's a gradual build up and is confirmed by the taste effect over that time. It's obvious that I am particularly sensitive to this taste and aroma as the missus said it tasted just a little rubbery but for me I may as well have licked a lolly made out of tyre rubber! Of course she was probably suffering from gradual onset de-sensitisation.
I've ordered some silicone plugs of the correct diameter and I will be removing the ball and spring and using a plug and continue with further testing...
That was the first thing I did the first time I noticed it - it went into the ultrasonic with a dishwasher detergent solution and then a clean filtered water solution. Had no effect
I've considered a steel ball bearing - but it would probably not make a good enough seal without a stronger spring to press it right against the plastic hole enough and it's debatable whether that would be good enough either. - The nitrile was obviously chosen because of its pliant nature and when under pressure the surface would squeeze to make a nice tight seal and stop leaking - steel wouldn't do that