There is no pressure in the dewars that you can pour out of and for our purpose the stopper actually holds the LN2 pretty good. How big is that hole in the top of the dewar? You might be able to find a stopper that would fit. Its not like you're gonna store the ln2 for weeks. The stopper on my 35L Taylor Wharton is 2 3/8" round. The hole in the dewar is 2 1/2".
Still i would check and see if they would fill this type of dewar at your place before i bought it. I really think its unlikely. Like i said before i fill these myself.
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Last edited by GFDuke; 01-30-2012 at 12:26 PM.
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