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What gauge needle does everyone use to fill the pen vials ?
RE
Started by redRaul
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10 replies
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5 people
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Last activity 21 Jun 2026, 11:59 UTC · Jun 21, 2026
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11 posts from 5 people ,
written between May 2026 and Jun 2026. Authors show as a member label or first name — they cannot reply here.
RE
redRaul
15 posts · first seen Dec 2025
OP
What gauge needle does everyone use to fill the pen vials ?
ER
EricB46
26 posts · first seen Jan 2026
5ml syringe so you can suck the air out as you fill and not mess around with a vent needle
SN
snare_amo
55 posts · first seen Mar 2026
That’s an interesting approach. I assume you’re only able to use 2ml of reconned then, yes? Or do you have residual pressure afterwards? The math ain’t mathing for me with a 3ml fill.
ER
EricB46
26 posts · first seen Jan 2026
By the time all the solution is in the vial you’ve got an empty 5ml syringe, do your math again 😉
ER
EricB46
26 posts · first seen Jan 2026
Never had an issue getting a full 3ml from a 5ml syringe into a pen part and created a vacuum
SN
snare_amo
55 posts · first seen Mar 2026
That’s outstanding! When I use up the last of my 3mls, I’m definitely trying this. Thanks for sharing the tip!!
ER
EricB46
26 posts · first seen Jan 2026
I stumbled upon it tbh I got given a load of 5ml pipes and just started using them for pep vials
EM
emma_26
16 posts · first seen Dec 2025
Are you using bba bac 3ml vials?
SN
snare_amo
55 posts · first seen Mar 2026
I’m not. I have 10ml Hospira vials.
PO
pondRich
2 posts · first seen Jun 2026
They don’t make hospira bac in 10ml only 30ml
SN
snare_amo
55 posts · first seen Mar 2026
That was the end of the thread
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