PBW for cleaning beer tube/line. Question

[saeroner]

Ok so i used PBW to clean the keg and forced PBW into the beer tubing (been sitting 3 weeks in the tube). If i connect the line to the keg (filled with beer) will PBW sneak back into the beer/keg? I just want to force out the PBW by running maybe a pint of beer out.

I would do it with a keg filled of water but I have no spare...

Make sense?

 

[tooldudetool]

Liquid will always travel from high pressure to low pressure. With the keg disconnected, open the tap so the pressure is relieved, and assuming you have some pressure in the keg, it will push out into the unpressurized line when you hook it up.

 

[b-boy]

It will push it out, but personally I'd want to run a lot of star san and water through there before I drink it. Especially after 3 weeks. It tends to leave deposits when it sits for a long time like that.