So I I accidentally left beer sitting in my lines for a couple months (I thought I had drained everything until I bumped the tap handle and beer came out).
I took EVERYTHING apart and cleaned and bushed it with BLC and let it soak in BLC for 16 hours or so. Some of the parts are yellowed (beerstone?) and I am wondering if they are still OK to use and if they will taint my beer.
Note that these images were taking AFTER the cleaning mentioned above.
Shaft (probe?) of the coupler:
Ball from inside the coupler:
One way valve for the gas line to the coupler: