Just winterized my fresh water system, the old fashioned way. Drained system addded 6gals of Pink stuff turned on pump and did not see any pink at the faucets.. Hummmm. Guess what happened. I had put some bleach in the water system a while ago and apparently there was some left in the system. The bleach removed the pick color from the antifreeze so you could not tell when the pink was in the lines. Flushed system with fresh water, added more pink stuff and all was good. Passing this along just in case someone runs into this situation. Put a tiny bit of bleach into a container with some pink stuff and it turned clear. Just FYI.