I did this today. I ran the water through all of the faucets, let it sit a while and flushed, flushed, flushed. However, whenever vinegar water came through the galley faucet, it was fizzy, as if I had also added baking soda.
Just curious. Was the vingar diluted or full strength?
If diluted it is often little more than good moldfood. After all, it is biodegradeable and was made by fermentation. pH swings are not a very effective sterilyzing method unless quite extreme and sustained.