How often to replace big O ring

[vNmd]

How often should the big O ring on a keg be replaced? I bought a new set when I bought a new (used) keg, but I noticed on one co2 was escaping through the seal. Not sure if they need replacing after a certain amount of use? That particular one is maybe a year & half old.

 

[user 4295]

A little keg lube on that oring should take care of it. They are quite durable and should last a long time. A leak on the lid is usually from some deformation in the keg. Keg lube and a shot of CO2 at about 30 psi should set that lid

 

[vNmd]

I never thought of keg lubing on the big o-ring. I just emptied that one but will try with water.

Thanks