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Old 02-08-2008, 01:47 AM   #1
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Default Keg Sealing Problems

I got a hold of some corny kegs the other day. I have an issue with sealing a couple of them. They will seal at higher pressures, say around 20psi but when I drop to a lower pressure they leak. I can here a slow leak and the CO2 tank running. Does anyone have any tips.

I have cleaned the sealing surface, and the o-rings are in good shape.

I don't want to serve my beer at 20psi.

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Old 02-08-2008, 01:54 AM   #2
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Can you tell where the leak is? Let's start there,.

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Old 02-08-2008, 01:58 AM   #3
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you might want to give some keg lube a try

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Old 02-08-2008, 02:00 AM   #4
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Quote:
Originally Posted by Jester369
you might want to give some keg lube a try

Is that just food grade grease or a specific product?
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Old 02-08-2008, 02:02 AM   #5
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Quote:
Originally Posted by mr x
Can you tell where the leak is? Let's start there,.
Yea at least on this Keg it is coming from the o-ring seal. I have two others that instead of having a welded seam for the pressure relief have a plastic nut. They are leaking from the nut.

So out of 5 kegs I have:
2 that seal.
1 that leaks from the o-ring at low pressure.
2 that leak from the pressure relief valve seam.
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Old 02-08-2008, 02:11 AM   #6
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There are a few products you can use for keg lube. Check some of the big online HBS suppliers. I use Dow Corning 111.

I'm having a hard time picturing your relief valve.

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Old 02-08-2008, 02:24 AM   #7
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Quote:
Originally Posted by mr x
I'm having a hard time picturing your relief valve.

I have 3 of these kind.
of those 3, 2 seal well and one leaks around the o-ring. I will try the keg lube. Perhaps a new o-ring.


I have 2 like this that both leak from the pressure relief valve. It appears to be a plastic valve that has a plastic nut on the underside of the lid. The other ones (first picture) are welded to the lid. They also have a lever instead of the pull ring.
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Old 02-08-2008, 03:40 AM   #8
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I picked up one of these that leaks too. In fact the nut was half way sheared off when I got it but completely sheared when I tried to tighten it. There is an o-ring between the nut and the inside of the lid.

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Old 02-08-2008, 03:44 AM   #9
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I will have to take it apart and see. The nuts are in good shape but I wasn't sure if they came apart or not.

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Old 02-08-2008, 02:16 PM   #10
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First the bad news those old firestone plastic pressure relief valve replacement are virtually impossible to find.

The rubber grommet inside the valve may need replacing and you may be able to find and replace those. I have some like it but since none of them leak I have not taken them apart So I guessing that it's doable but I have pulled the grommet out of other types.

If you can't fix the pressure relief valve you can always remove them and replace them with a nut, bolt and metal washers with a rubber washer sandwiched in between on the inside to hold the pressure. (use a stainless steel nut, bolt and washers)

The lid that leaks may possibly be remedied by:

the addition of keg lube or try rotating the lids 180* sometimes that helps. Also try grabing the pressure relief valve and hold the lid in place while at the same time latching the bale lever.

Apparently this happens a lot I had one do me the same way last weekend. Also ramping the pressure up higher than usable for brewers is a way a number of sellers fool people into thinking they've bought a keg that hold pressure.

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