Fresh water tank on board

[Bigairh20]

How does one sanitize the fresh water tank and how often. I have never used it yet and it is new always hook up to city water but going to nascar race at pocon and will need to use water.

[B D HOWie]

The sanitize ratio is 1/4 cup bleach per 15 gal. capacity.
I hook up my FW hose to RV fill connection, pour the amount of bleach I need into the hose and then connect to my water source and fill tank. Also, run faucets so lines will be sanitized. Let stand for 12-24 hours. Drain, fill and flush twice.
I usually do this in the spring and early fall. If we do not use RV for several months then I sanitize.
Paul

[Bigairh20]

Awesome. Thanks