Carbonation Cap gasket - what size?

[Carolina_Matt]

I have a carbonation cap that I bought from Morebeer, and it's not sealing anymore. I looked at it and realized the flat gasket on the inside is missing. It must have fallen out at some point. Does anybody know what size it is, and where to get a replacement? The o-ring on top is in tact, so I'm just missing the wider gasket.

https://www.morebeer.com/products/carbonation-line-cleaning-ball-lock-cap-stainless.html

 

[Dr_Jeff]

The red "Grolsch Style" seals work fine.

 

[Carolina_Matt]

Thanks, I'll pick one up next time I see one.

 

[kiwipen]

I just looked at mine and a 3/4" gasket (garden hose thread) fits perfectly.