Brutus Brewer
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Title pretty much sums it up. Thought about trying to plug it up and force air into it. Any ideas?
fill it with hot tap water first for a while.
If you fill it with hot water and then cork it, it will force the water to expand and create a higher pressure and will probably fix the dent, assuming it's not on a crease.
If you fill it with hot water and then cork it, it will force the water to expand and create a higher pressure and will probably fix the dent, assuming it's not on a crease.
Kidding right?fill it with water, cork it, freeze it
Kidding right?
Water contracts when it cools (until it's cool enough to crystallise, whereupon it expands); filling it with hot water and corking it will produce a lower pressure, not a higher one.
When the hot water gets into the tank it will still be vaporizing. If the water vapor has nowhere to escape since you capped it and it is an expanding gas it will increase the pressure. Once the gas cools (which will take a bit) then it will condense back to water form.
Maybe if it's boiling, but empirical testing with (as originally specified) hot water fails to show a significant increase in pressure.
WHOA, easy with the air compressor thing. That's a lot of air in something not meant for pressure. Ever see a tire blowout? You could get really hurt. Partially fill with some water before doing anything crazy. Water doesn't compress! Play it safe and use a stick, live with it or buy another one!
WHOA, easy with the air compressor thing. That's a lot of air in something not meant for pressure. Ever see a tire blowout? You could get really hurt. Partially fill with some water before doing anything crazy. Water doesn't compress! Play it safe and use a stick, live with it or buy another one!
Huh?
I didn't pour it into a vacuum. I poured it into a PET container with an airtight closure and a minor dent.
empirical, adj. Derived from experiment and observation.
Fill it with water to about 4 inches from the top.
Open your hand and smack the top of the opening really hard with your palm. The pressure sould force the dent out. If you do this to a partially filled bottle you'll break the bottom out...should work with plastic...
If you fill it with hot water and then cork it, it will force the water to expand and create a higher pressure and will probably fix the dent, assuming it's not on a crease.
You'd be suprised, this should work well. I was going to say about vinegar or lemon juice plus baking soda and cap it to apply low pressure to pop the dent, but I totally didn't think of homebrewer_99s' suggestion!
No, lordbeermestrength's understanding is low.
We're not talking about putting hot water in it, corking it, and leaving it. Sure, over a long time (several hours) it will cool and then contract.
You put hot water in it, cork it, and it *will* expand - the heating of the air above the water causes that. Shake it, and it expands even more. I know this every time I clean my kegs - fill with hot water and OxyClean, seal the lid, and push on the poppet - pssshhh! goes the poppet. I would have to let it cool overnight before it would start to pull a vacuum.
Gosh, and I didn't even get a 4-year degree.
-keith
No, lordbeermestrength's understanding is low.
We're not talking about putting hot water in it, corking it, and leaving it. Sure, over a long time (several hours) it will cool and then contract.
You put hot water in it, cork it, and it *will* expand - the heating of the air above the water causes that. Shake it, and it expands even more. I know this every time I clean my kegs - fill with hot water and OxyClean, seal the lid, and push on the poppet - pssshhh! goes the poppet. I would have to let it cool overnight before it would start to pull a vacuum.
Gosh, and I didn't even get a 4-year degree.
-keith
If you fill it with hot water and then cork it, it will force the water to expand and create a higher pressure and will probably fix the dent, assuming it's not on a crease.
Yes and no.
When the hot water gets into the tank it will still be vaporizing. If the water vapor has nowhere to escape since you capped it and it is an expanding gas it will increase the pressure. Once the gas cools (which will take a bit) then it will condense back to liquid form.
I don't beleive my understanding is low. I just read what was said by Neunelfer. Did I misunderstand? Doesn't look like it.
Even at 30 psi it can hurt you. Try calculating how many pounds of air would be in the carboy. That's 30 lbs/sq inch times the amount of cubic inches in a carboy. You should fill the carboy with warm water at least 75% full, THEN put 30 psi on it. Much safer!Mythbusters did an episode where they pressure tested standard 5gal water bottles and they held 95 psi. I would guess a better bottle could do the same, so if you stay under 30 or so it should be doable.
Either way though, I would rig something and have it at the end of a 50' air hose. If it works your better bottle is fixed. If it doesn't you have a $25 firecracker.
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