I just bought a whirlpool dishwasher( portable ) the people who owned it before me changed it to a non portable unit as they installed copper tubing in to what I think is the fill hose at the bottom of the back of the machine. It appears to be a 1/4in dia hose. Would anyone know if this is the fill hose, does the copper tubing come out, and what would I need to get to make it portable again? Thank You