how does it work?

Hi all
I know to get your water from the sink most use hand pump type faucets. What about these showers is the water flowed by electric pumps/
gravity/ garden hose attached to hook up and the presure allows flow?
Do you have hot water too?
I did just see and read a post on heating solutions,so that question is being answered.
Haven.t started my build yet heck haven't even purchased a trailor yet, but when I do I'll know what I want in it. :
I know to get your water from the sink most use hand pump type faucets. What about these showers is the water flowed by electric pumps/
gravity/ garden hose attached to hook up and the presure allows flow?
Do you have hot water too?
I did just see and read a post on heating solutions,so that question is being answered.
Haven.t started my build yet heck haven't even purchased a trailor yet, but when I do I'll know what I want in it. :