so that they can be placed in the same vertical plane each hose also has an outlet opening 15 which is placed below the tube 11 the tube 11 box 12 as well as the hoses 14 are preferably made of plastic the box 12 and the hoses 14 together form a condensation chamber in the arrangement shown in fig3 the box 12 is placed outside one of the vertical tub walls 10 the hoses 14 however are placed above the roof part 16 of the tub and continue down between the outer cover 17 and the second side wall 18 of the tub so that the hoses end above the bottom plate 19 of the cover the hoses 14 are preferably placed so that the largest possible length slopes toward the box 12 in order to take care of the few drops of water which could be the result of condensation in the end part of the hoses there is a plate of plastic or a small plastic container 20 below the openings 15 from which the water easily evaporates the device operates in the following way the heated dishwater in the tub during the dishwashing procedure transfers its heat to the walls of the tub and to the dishes when the dishwater is emptied the surrounding tub walls will cool as a result of which the steam which is present in the tub is partly precipitated as water droplets on these walls the droplets flow down the walls and are collected in the sump at the bottom of.