Yep, if you hold fresh water in the tank, I recommend draining it, should be a drain under the tank and bleaching and refilling every 3-4ish months or so. On my old trailer, a four seasons one with tank inside, before winter hit, I would make sure it was bleached, drained and refilled, in case other campers water lines broke and the water quit. Glad I did this several times for that reason.
When you bleach it, add the unscented plain bleach and fill it all the way up, then turn off city water, and run the pump, then run each faucet, hot and cold, until you smell the bleach. I sometimes, after doing this and turning the pump off and turning city water back on, will leave the fw tank full for a day or two, if the weather is above freezing, to allow the bleach to really work. Then drain it and refill it with straight city water.
Just to add, it's possible to get bacterial growth in a HW tank, using only electric, so to negate this, kick on the propane, it tends to heat to a higher temp, at least mine does, and use that for a day or so. The extra higher heat seems to kill the bacteria, and then go back to electric. You'll notice an odor in the water, kind of sulpherish when this needs to be done. Bleaching the lines and tank mentioned above also kills this bacteria.
Here's a step by step with the ratio of bleach and water.
http://rvbasics.com/techtips/sanitiz...er-system.html
Linear Mode
