The VESTA Space-Saving Built-In Dishwasher A specialized dishwasher for the RV and Marine industries designed to clean glasses and dishware without wasting valuable water or space. VESTAUs new dishwasher uses no more than 2.4 to 4.2 gallons of water to get your dishes clean and dry. So, youUll not only be getting outstanding dishwashing results, but you will also be conserving a precious resource in your RV or boat - water.