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-   -   Rubber stopper (http://www.homebrewtalk.com/f11/rubber-stopper-179460/)

castillo 05-25-2010 02:51 AM

Rubber stopper
I have a 1000ml flask that takes a #9 stopper. But I can't seem to find a #9 stopper. I plan on making a yeast starter for my next brew in this flask. Any suggestions? Thanks.

JewBrew 05-25-2010 03:31 AM

Cover it loosely with a rubber band an plastic wrap or tin foil.You could always go with the old fashioned hole-in-a-balloon air lock.

demonrichie 05-25-2010 08:39 AM

take the flask wherever youd get a stopper and measure it right there. if it fits go for it

Sacdan 05-26-2010 05:16 PM

Don't use a stopper when making a starter. Use a piece of snitzed foil. You want Oxygen to get in and Co2 get out.

wyzazz 05-26-2010 06:29 PM

Loosely crimp a piece of sanitized tinfoil on that flask and you're all set!

RiverCityBrewer 05-26-2010 06:57 PM

I used a stopper one time for a starter, now its just foil as it is much easier to deal with when using a stir plate to allow for a good gas exchange.

castillo 05-26-2010 09:10 PM

I was planning on a using a stopper with an airlock. Does oxygen not get in with an airlock?

wyzazz 05-27-2010 12:19 AM

Nope, things get out not in with an airlock. Think of it as a check valve, it lets pressure out but not back in.

k47k 05-27-2010 01:20 AM

an 8 1/2 stopper fits a standard 1000ml flask.

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