Hi and Welcome to the Forums
My 2006 PW Lexor came with a camco- they are under $10 amazon or camping world, probably walmart ( which usually has a good stock of RV stuff)
make sure your water supply hose is "safe" for drinking water- usually colored white
before our first trip ( and with very limited experience) I practice camped in the driveway to learn all the systems --- where I had access to internet, phone and a full tool set.
It also helped me determine which tools etc I needed to carry.