Bought a 2007 MH this year. Water was pretty foul from the tank and also park hookups. Likely had never been cleaned before.
Sanitized the tank and lines and there is a significant difference in the taste of the water. I have no problems drinking from my tanks now which is nice not having to tote around drinking water since we sit on 80 gallons of it already.
It's not hard to do and in my opinion worth doing
2007 Fleetwood Flair 33r
33 feet, 2 slides, I assume everything is stock. It's an ex rental unit.