Re-Winterize question

[NoodlesWIU]

So I took advantage of Thursday's 75 degree day here in Chicago to de-winterize, and sanitize our fresh water system using a tsp of Sodium Dichlor crystals and filling the fresh water tank and purging the antifreeze. I let the solution sit for 24 hours in the tank and lines, and then drained it into the gray tanks to sanitize them and let them sit for another 24 hours before emptying.

Well it is now supposed to get below freezing the next several nights and I opted to winterize it again quick instead of chancing it. So my question is; Since I just sanitized the system, do I need to re-sanitize because of the Antifreeze, or can I just run fresh water through the faucets until the AF is gone?

[mark5w]

That's all I do when I dewinterize. Run fresh water thru the system and then drain fresh water tank.