8 replies to this topic

[chuck_d]

If I just lightly put the correct size rubber stopper on a flask and autoclave that in my pressure cooker will it work out alright with letting gas vent as needed?

[No Party JKor]

Yeah, but it might suck the stopper into the flask when it cools.Also depends on whether the rubber can handle the heat.

Edited by JKoravos, 17 June 2009 - 07:43 PM.

[Kremer]

Yeah, but it might suck the stopper into the flask when it cools.Also depends on whether the rubber can handle the heat.

This. If you just want to sterilize it I'd stick a toothpick down the side of the stopper to keep it from sealing completely, then when it's done pull the toothpick and push the stopper down to seal, if you determine it can take the heat.

[No Party JKor]

When I sterilized my flask I just put a piece of foil over it. Not sure that the best way, but it's what I did.

[chuck_d]

Thanks guys, yeah I've done the aluminum foil thing in the past, but I want to be able to sterilize a bunch of 50 mL flasks and then just stick them in the closet. I just don't trust that I won't end up accidentally moving or puncturing the foil for longterm storage. I guess I'll pick up the rubber stoppers, try it once and if they get sucked in then I'll try the toothpick trick.

[DubbelEntendre]

https://pivo.norther...rm=foam stopperThese stoppers allow air into them after you pressure cook the flasks so they won't get sucked into the flask. Also rated for autoclave temperatures.

[chuck_d]

https://pivo.norther...rm=foam stopperThese stoppers allow air into them after you pressure cook the flasks so they won't get sucked into the flask. Also rated for autoclave temperatures.

Thanks, yeah, those are a bit large for 50 mL flasks though. I might be able to find something similar for the smaller flasks.

[zymot]

Thanks, yeah, those are a bit large for 50 mL flasks though. I might be able to find something similar for the smaller flasks.

ScissorsCut them down to size.williamsbrewing.com carries them too.zymot

[chuck_d]

ScissorsCut them down to size.williamsbrewing.com carries them too.zymot

They are also 4x as expensive as rubber stoppers.