Originally Posted by retiredcamper47
You are correct Rich. Don't know what I was thinking about when I responded. Must have been having a senior moment
Guess the outside bathroom location threw me off. My city water hookup is on the front left side. That is what I love about this forum, there is someone there to set you straight.
You could be right about there being a connection for something else ,but I don't believe it would have been a HiLo option.
To Howard and Gert, Welcome to the Forum.
I believe the fill behind the locked door is a gravity fill access rather than a hose connection.
Also, you will want to sanitize the water system before using it, not knowing when it was done before. For a thirty gallon tank you will want to add a half cup of plain unscented bleach and fill the tank and then pump the treated water through the plumbing system. Leave it sit about a half day then drain and refill with plain water and flush through. Add the bleach by putting it into a gallon of water then pour it into the tank, that prevents full strength bleach from contacting parts that may react to it.