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Old 12-30-2011, 03:52 AM   #1
zeekage
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Default Liquid Disconnect won't seal

I just got some "new" kegs and tried one of them out the other day. I kegged a beer and put the gas to it to force carb it a bit. Afterwards I wanted to pull a sample just to taste it so I tried to hook up a liquid disconnect from another keg to it and it wont seal. I can push down pretty damn hard but the collar wont snap down locking the disconnect on the post. I searched around here and found a few people with the same problem but it usually ended up being actually a gas post (not the case for me, no notches in the post hex head, and i tried connecting a gas disconnect to no avail), or gummied up disconnects/poppets but i soaked mine in oxyclean and used keglube when i screwed them back on. I am baffled. Were there different size liquid posts at one point?? I have reason to believe this keg has not been used in 10+ years but i have no way of knowing for sure as I got it off CL with a bunch of other stuff. Interestingly enough I needed a different size wrench to get the post off as well. I used to use 7/8 i think but this one was 13/16 or something like that.

I linked some photos of the offending post and a normal one that I have. As well as the markings on the new keg I just got in case it can help someone identify what's going on.
Post that I can't connect disconnect to
Normal liquid post from another keg
Keg Markings

Any info would be appreciated. I suppose I could just replace the posts but id rather spend that money on new sets of QDs for them and not posts/poppets!

Thanks!

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Old 12-30-2011, 04:24 AM   #2
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All I see is that the o-ring on the new keg is a bit larger than the old one. I'd try swapping the rings.

The are a couple different sizes for the nut, but the post themselves should be the same. There are also 12 sided 'star' posts.

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Old 12-30-2011, 05:00 AM   #3
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Remove the post from the "bad" keg and the "good" keg, and compare their length - and their poppets. There's a multitude of poppets and perhaps the "bad" keg post has a poppet that's too long for that post...

Cheers!

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Old 12-30-2011, 02:41 PM   #4
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My guess is that it is a poppet issue as Day Trippr stated

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Old 12-30-2011, 02:43 PM   #5
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I put a new oring on both posts on the "bad" keg since it was old and i had no idea how old the orings were. I can try swapping it with the oring on a good keg though.

I never considered the poppet though. I did take the post apart to clean it and the poppet looked fairly normal to me though I didn't inspect it closely. I will do that and see. I have another keg from this same batch and as soon as I find time I'm going to clean that keg and try my disconnects on that one as well. I have a sneaking suspicion I'm going to have the same problem with it.

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