looking for info on how to a do a on-demand pumping solution i am looking at a few different pumps form way cheap to more expensive i am levitating towards a flowjet 2.5gpm pump with 30 gallon tank just got that off of ebay along with the shower the though is to plumb the show as a hot water tank with a kitchen facet sprayer for the wife for the sink and a shower head for for showering i am sure i am over thinking this and could just install a water pump toggle switch in the power distribution panel by the battery box byt them again i never do anything simple LOL