How long can starsan stay in keg?

[tarponteaser]

Morning gang,

After a 4 year break from brewing I'm back in the game. The hiatus was unintentional, stuff happens and things got hectic. Anyways, my latest batch is cold crashing and I'm ready to keg and realize I had left a working solution of starsan in the kegs after cleaning them. Would it be ok to just drain and use as is?

Thanks for any insight

 

[eadavis80]

I don't keg, but I do use Star San. I would make a new batch since it's as old as a presidential administration.

 

[dmcman73]

I would clean them good with some PBW. I've noticed that if Starsan is left in Stainless for to long, sometimes a light coating of oxidation is left on the surface of the stainless that you can see when wiping it with some paper towels (it'll be a dark grey color residue), you don't want that in your beer otherwise it will make it taste metallic.

 

[m1k3]

Welcome back!

I agree. You don't want to ruin your first batch back at it.

I would at least dump it, then hose it out (once or twice) and resantize it.