Vial pressure

[Super-Chump]

Just wanting peoples opinion on vial pressure. To elaborate, I've been told to "always put back in what you take out". In other words if I take out 1ml of liquid, I need to put 1ml of air back in to keep the pressure inside the vial at the original level.

Is this actually necessary?

Thanks in advance

[HawaiianPride.]

Nah, not always necessary especially for only 1cc.

[Super-Chump]

Thanks for the reply, I guess I won't stress about it too much then.

[HawaiianPride.]

NP. Larger portions withdrew will definitely build pressure though.

[Far from massive]

While not the end of the world, its certainly good procedure. Once you pierce a septum with a needle it is no longer a completely air tight enclosure. If you pull out juice without adding the same air volume (preferrably before withdrawal) then you have created a low pressure area inside the vial which will in turn allow air and contaminants to enter the vial through the puncture point. Even with proper procedure there is still always some migration of air and contaminants through punctured septums this is why in the US once a septum topped vial is pierced it expires one month later ( guys on TRT love this as many are only being prescribed 4 mls a month so that leaves 6 mls a month for blasting LOL) On top of this not adding the air prior to withdrawal will make withdrawing the AAS take more time as you fight the vacuum.

So long and short, no don't stress but add in the future as its a good thing all round.

[Super-Chump]

Cheers FFM. It doesn't take long so I will do it in the future, thanks