keg repair - leak at base of post

[atomicpunk]

then it sounds like the dip tube o-ring; or perhaps the post o-ring. just replace em both as they cost .10 each and give piece of mind. don't forget the food grade lube.

Nope, already replaced them.

[Weenie Boy]

This happens every once in a while. The threaded boss (the part the post screws onto) becomes stressed from repeated torquing and overtightening of the posts. The stress is manifested by a small crack in the stainless right where the boss is secured to the keg body. It is an easy "fix" if you can weld stainless because the cracks are so small that you don't even need filler rod, just a fusion weld.


Weenie Boy

[atomicpunk]

Yep, that is exactly it! Looking inside with a mirror we can see the stress crack.

We hit the top with silicone to see if that will work. If not we'll look for a homebrewer that will weld for beer!

Thanks!

[Nyakavt]

This might be a good application for staybrite silver solder, if the crack is small enough. It bonds well to stainless and is very strong (typically used for AC system repair) but is tricky to keep the joint clean: the heat usually burns the liquid flux. If you are patient and good at soldering then it may be an option, you can find a small 1/2 oz hobby kit of the stuff for around $8 + shipping.

I don't know how well silicone is going to work under pressure, but one way to find out!