Homebrewers Association | AHA Forum

General Category => Kegging and Bottling => Topic started by: muddypuddle on February 18, 2010, 07:22:43 pm

Title: leaky keg top
Post by: muddypuddle on February 18, 2010, 07:22:43 pm
I have 1 corny keg that is giving me fits.  it seems like it is pressurized and then there is a slow leak of CO2.  i have tried 3 or 4 other keg lids on this one keg.  is there a lube or sealant that i can use to seal this thing?

thanks for your time-

Phil
Title: Re: leaky keg top
Post by: denny on February 18, 2010, 07:23:35 pm
When I have that happen, 90% of the time a coating of Keg Lube on the o ring fixes it.
Title: Re: leaky keg top
Post by: mikeypedersen on February 18, 2010, 07:27:19 pm
When I have that happen, 90% of the time a coating of Keg Lube on the o ring fixes it.
+1.  Also tapping the lid with a hammer (with the gas hooked up) helps to seat the lid where the keg wants it.
Title: Re: leaky keg top
Post by: muddypuddle on February 18, 2010, 07:29:28 pm
thanks!  specific brand of keg lube? any respectable LHBS will have it, right?

thanks
Title: Re: leaky keg top
Post by: denny on February 18, 2010, 07:42:46 pm
IIRC, mine is just called Keg Lube, and yeah, I get it at the LHBS.
Title: Re: leaky keg top
Post by: zee on February 18, 2010, 07:51:34 pm
keg lube is definitely the answer here. i got the cip film from morebeer at the nhc, and its been great: http://morebeer.com/view_product/16030//CIP_Film_4_oz

that being said, sometimes a keg lid just doesn't want to seat properly. what i've done on kegs that just don't want to seal is put your pressure up to 30 or 40 psi and pop on the gas in connector. the added pressure will usually pop the o ring into place. if that still doesn't work, pull up on the lid and wiggle it while it is under pressure.
Title: Re: leaky keg top
Post by: mikeypedersen on February 18, 2010, 07:51:42 pm
I think that Keg Lube is the one that I use too.  It comes in a white tube with blue writing.  If your LHBS has spray lube, you might want to use that as I have heard that the application is easier.
Title: Re: leaky keg top
Post by: enso on February 18, 2010, 08:25:51 pm
Have you found the actual source of the leak yet?  You say top but do you know the specific location?

If you have some star san spray it on all the connections.  On the posts at the base and on top (the poppets), around the rim of the lid, and on the pressure relief valve (if it has one).  Charge it to 30 psi.  You will see it bubbling where it leaks.  Then you can diagnose the problem better.  There are many things that could be causing the problem, so you need to narow it down.

Could be a bad poppet, post not tightened down enough, bad or not lubricated o-ring, loose or worn out pressure release valve, or a dent in the lid itself.
Title: Re: leaky keg top
Post by: tom on February 18, 2010, 08:57:14 pm
Ditto. Diagnose the problem before fixing it.
If the lid is leaking you can "adjust" the corny with a small crescent wrench.
If the poppet is leaking you might have the wrong type of poppet or it has some nicks in it.
Title: Re: leaky keg top
Post by: bluesman on February 18, 2010, 09:21:58 pm
Have you found the actual source of the leak yet?  You say top but do you know the specific location?

If you have some star san spray it on all the connections.  On the posts at the base and on top (the poppets), around the rim of the lid, and on the pressure relief valve (if it has one).  Charge it to 30 psi.  You will see it bubbling where it leaks.  Then you can diagnose the problem better.  There are many things that could be causing the problem, so you need to narow it down.

Could be a bad poppet, post not tightened down enough, bad or not lubricated o-ring, loose or worn out pressure release valve, or a dent in the lid itself.

+1

The hardest part of fixing a gas leak is finding it.  ;)

Fixing it is the easy part.  :)
Title: Re: leaky keg top
Post by: 1vertical on February 20, 2010, 03:38:30 pm
I was told a great method to help you find the leak.

Take an old car tire innertube and cut it so that you
have about an 8 inch long cross section forming a rubber cylinder.

Stretch this rubber sleeve over the top of the Keg and pull
it down past the hand holds...clear down to the metal section.
Set the keg into a liquid catch basin of some type...
then fill the top with water....you will be able to see your leak.

Slick Trick!
Title: Re: leaky keg top
Post by: weazletoe on February 20, 2010, 04:23:27 pm
thanks!  specific brand of keg lube? any respectable LHBS will have it, right?

thanks

In a pinch, I've also used Vasoline, cherry chapstick, and hemoriod cream.
Title: Re: leaky keg top
Post by: BrewArk on February 20, 2010, 05:47:32 pm


In a pinch, I've also used Vasoline, cherry chapstick, and hemoriod cream.
on the keg... right?
Title: Re: leaky keg top
Post by: 1vertical on February 20, 2010, 08:49:09 pm
ROLF
Title: Re: leaky keg top
Post by: weazletoe on February 26, 2010, 12:58:11 am


In a pinch, I've also used Vasoline, cherry chapstick, and hemoriod cream.
on the keg... right?

 Of course. ow on earth would roid cream on your sphincter seal a keg? Le's not get ridiculous.  ;D
Title: Re: leaky keg top
Post by: bluesman on February 26, 2010, 01:31:52 am
would roid cream on your sphincter seal a keg?

I'm afraid not.  ;D