You'll be surprised what you find and where you find it. Unlike the house builder, Dutchmen doesn't even sweep up the cutout plugs and sawdust, wherever it lands it stays.
I sanitize the fresh water system before I use it, I run a bleach solution through the system. Then clear the waterpump screen and faucet diffuers of the construction debris. I flush the system with fresh water until there is no more clorine smell. Clean the screen and disffusers after each flush.
Half a tank of fresh water, the bleach and go for a drive around town, to stir things up. Same deal to flush the system, usually two times and the clorine smell and taste are gone. I do the same every spring too, you never know what is lurking in the water up pickup along the way.
When I was a kid I was going nowhere fast, now I'm an old man I'm going everywhere slow.