Smelly Fresh Water

I am a new owner of a 2012 FC. We just picked it up about 2 months ago. We are preparing for our first long trip and I noticed a sulfury smell whenever I ran either of the faucets or the shower. I originally thought the smell was coming from the gray water tank, but I have confirmed that it is the fresh water. Last night, I added chlorine bleach to a full tank (39 ga) of water and let it sit for a few hours. I ran the faucets until I filled the gray water tank then emptied what was left in the fresh water tank via the valve under the tank. I then refilled the fresh water tank with fresh water. When I ran the faucets, for a while no smell. Then the smell reappeared when I tried running the "hot" water (I put this in quotations because the hot water heater is off, so the water was actually cold :)).



Any advice or insight would be appreciated. I would love to resolve this before we head out on Friday!