Need thicker Corney keg lid o-ring number

[Crimsonwine]

I came across a thread where someone gave a McMaster Carr part number for a thicker lid o-ring that helps seal the lid leak...and I can not find it again...

This is not for the standard o-ring #9452K218 but for a thicker one similair to what williams brewing sells....does anyone have the mcmaster part number?

Thanks

 

[Paulasaurus]

Anything wrong with the Williams Brewing o-ring? I'm having a similar issue getting an older 3 gallon corney to seal with the normal seal. No matter how much pressure I put it under the lid still leaks.

 

[wyzazz]

Maybe the silicone one?

https://www.homebrewtalk.com/wiki/index.php/O-ring

 

[Bobby_M]

Definitely try the silicone, #9396K926. I don't think the #418 ring will work. It's not a larger cross section but rather an 1/8" larger in overall diameter. The silicone is a softer rubber and combined with a food grade grease, it should seal as much as that lid is capable of. Any leaks after that are due to a defect in the lid or keg surface and that would need to be found and addressed.

 

[Paulasaurus]

Sweet, thanks for the part #'s

 

[Homercidal]

Maybe the lid arms are bent? Hard to believe the standard ring won't work unless there is a bent part. Maybe the rim?

 

[Paulasaurus]

Nothing looked bent and both the lid and the keg lip looked normal. It didn't feel like it had as tight a snap to it when closing the lid, maybe i'll check to see if anything is bend on the lid before ordering. And i'll lube up that o-ring with a ton of keg lube and give it a go again.

Gotta get it working, had to bottle the entire last batch cause my other 5 gallon kegs were full. I don't enjoy bottling as much as I used to now that I know the joy and time savings of kegging.

Thanks for the ideas and sorry to thread jack Crimsonwine

 

[malkore]

I can vouch for the Williams Brewing 'extra thick n' soft' lid o-rings they sell. They've helped my abused cornies hold a good seal again without running 30psi to seat the lid even.

 

[remilard]

I can vouch for the Williams Brewing 'extra thick n' soft' lid o-rings they sell. They've helped my abused cornies hold a good seal again without running 30psi to seat the lid even.

Is it silicone? That's the only food grade material I can think of softer than Buna-n (PTFE is harder). Even McMaster-Carr only has them in one thickness if you choose dash number 417. However I find those seal far better than the buna-n ones and they are good enough for my kegs.

The buna-n quad seal post o-rings are a game changer.

 

[Crimsonwine]

I thought someone posted that they had a MC part # for an o-ring that was the same that Williams was selling....

I have a keg that wont seal unless I have 30 PSI on it and that is with a new o-ring and Vaseline...and if I drop the psi to serving pressure it starts to leak...

I have inspected the lid and even exchanged lids and it still leaks....so my last resort is to try the softer, thicker o-ring...

and for those that want details....I kegged a beer in it and sealed it with 30 psi and put it into my Keezer...I bled off the excess pressure to 10PSI and after 30 minutes I noticed my COS gauge was going erratic and blowing off the relief valve...it was weird and I traced it to the Corney constantly leaking....

I want to put an order into MC for O-rings anyway so I might as well get the right one for the lid...

 

[SpanishCastleAle]

And i'll lube up that o-ring with a ton of keg lube and give it a go again.

'Extra' lube won't help it seal any better than the 'right' amount, just a very light coating is all you need.

I haven't actually measured them but the silicon o-rings from McMaster seem to have a slightly smaller cross-section than the buna ones from HBSs. Sometimes I have better luck with the buna ones.

 

[diatonic]

Hey Paulasaurus, did you try the thick silicone McMaster o-rings? I just ordered a 5 pack of them, curious how they worked for you.

I'm fermenting in a 15.5 gallon corney and now that primary fermentation has slowed after 4 days, co2 is escaping the lid rather than the blowoff tube I rigged on the gas-in post.

 

[Paulasaurus]

Nope, haven't had a chance to order anything up yet.

Let me know what you think of them once you have a chance to put it to the test.

Thanks!

 

[maida7]

I've got an idea. Slip a penny under each of the legs. This will press the lid up a bit further for a tighter seal. It's worth a try.

 

[Paulasaurus]

I've got an idea. Slip a penny under each of the legs. This will press the lid up a bit further for a tighter seal. It's worth a try.

That is most definitely worth a try. Good thinking!

 

[diatonic]

I've got an idea. Slip a penny under each of the legs. This will press the lid up a bit further for a tighter seal. It's worth a try.

I tried that yesterday. It's hard, but doable. Still had a slight leak without pressure in the keg.

 

[maida7]

I tried that yesterday. It's hard, but doable. Still had a slight leak without pressure in the keg.

Perhaps the lid or keg top is slightly bent. Use a hammer, brass punch, cold chisel, etc... to reshape it.

 

[diatonic]

Nope, haven't had a chance to order anything up yet.

Let me know what you think of them once you have a chance to put it to the test.

Thanks!

These silicone o-rings from McMaster work great! $7 for 5.