As long as 'pink' doesn't get in the fresh tank and hot water heater plus flush well in the spring, why should there be any nasty after taste? Yeah, I've had that 'misfortune' but no longer since I'm adding pink after both tanks and am running many gallons of water through the system in the spring along with doing a fresh tank sanitizing (more gallons of water).
Dang, this is a protection for a multi thousand dollar leisure time investment if your area has sustained below freezing temps. Why so emotional? Just blow it out if that works for you. Drain and then install RV antifreeze if that is your thing. If you feel you need a belt and suspenders, blow out then add the 'pink' stuff (my way)
Dave W along with my DW, Susan and our poodlepups, Callie & Molly,2011 Ford F250 6.7 CCLB, 5er Hitch Option w/B&W Hitch,,Ride Rite air bags, 2014 Montana High Country 343RL (38')