Confession time. We have lived in this rig full-time for a year and a half, through boondocking stretches, hookups, and a lot of different water spigots, and in all that time we had never once sanitized the fresh water tank. Not once.
So we finally did it, and it turned out to be far easier than the year and a half of avoidance suggested.
Why we put it off, and why you should not
There is no good excuse. Sanitizing is one of those jobs with no deadline attached, so it keeps sliding. Nothing tasted wrong, nothing looked wrong, and every month it stayed off the list was another month of it not seeming urgent.
The recommendation is every three or four months. We managed eighteen. If you are reading this and doing the same arithmetic about your own tank, that is rather the point of us posting it.
A pasty first, because we are in the U.P.
We filmed this at Nathan's mom's place in Michigan's Upper Peninsula, which meant the job got delayed once more for a pasty. If you have not had one, it is a folded pastry packed with beef, potato, rutabaga and onion, and it is a Yooper institution rather than a novelty.
Then we got to work.
The bleach-free method
Most sanitizing guides have you mix household bleach into the fresh tank. It works, and it also means a lingering taste, a rinse cycle you cannot shortcut, and a tankful of chlorinated water you should not be pouring anywhere you care about.
We used bleach-free sanitizing packets from Blu Tech instead, the same company that makes the water filter system we installed a few weeks earlier. It is NSF certified and EPA approved, it works alongside reverse osmosis and water softeners, and it contains no chlorine, oxidizers or acids that will sit in your plumbing corroding things over the years.
The practical upside showed up immediately: because there is no bleach in it, we drained the whole thing straight onto the grass in his mom's yard, with permission, rather than hauling it to a dump station.
Step by step, the easy way
The whole job runs like this:
- Drain the fresh tank. Whatever is in there now is going out, so open the low point drains and let it empty.
- Pull the taste filter. You do not want the sanitizer running through your final polishing filter, so that one comes out first and goes back in at the end.
- Add the packets. This is where a filter system earns its keep. Rather than mixing in a bucket and pouring through the fill port, we opened the filter canister and dropped the sanitizer in there directly. It dissolves into the line as the tank fills.
- Refill the tank. Full, so the solution reaches everything.
- Wait fifteen minutes. That is the whole soak. Not overnight, not a full day.
- Drain, refill, drain again. Two rinse cycles to flush the system.
- Put the taste filter back. Done.
If you do not have a filter system installed, the traditional bucket method still works and we cover it in the video. Mix the packets with water, pour it into the fill port, and carry on from the refill step.
What we actually found
Nothing dramatic, which is the honest answer and probably the reason it stayed off the list so long. No sludge, no smell, no horror show. Just a tank that is now genuinely clean instead of probably fine.
The real finding is how quick it was. Start to finish this is an afternoon job with fifteen minutes of actual waiting, and the reason we avoided it for eighteen months was entirely imagined difficulty. Doing it every three or four months from here is not going to be a burden.
Where to get the sanitizer
The packets are bleach-free RV tank sanitizer from Blu Tech, and our link gets you 7% off. The filter system that made the canister method possible is the AR3 three-stage bundle, and we wrote up that install separately if you want to see what is involved.
If you want more of this kind of thing, our newsletter is where we share what we are testing before it turns into a video.