Compact water-saving modular bathroom fixture

A bathroom fixture comprising:

• a) a flat rear panel having means for mounting in vertical disposition upon a wall surface, and defined by upper, lower and paired side extremities, and back and forward surfaces, said rear panel being elongated upon an axis centered between said side extremities and extending between said upper and lower extremities,
• b) paired parallel side panels forwardly emergent from said side extremities,
• c) a horizontally disposed basin embraced by said rear and side panels, and having first exit drain means for permitting downward flow of water away from said basin, said basin bounded in part by a bottom panel downwardly sloped toward said first drain means, and equipped with a retaining sidewall which enables said basin to hold a predetermined volume of water adequate for handwashing purposes, and
• d) a trough horizontally disposed below said basin and positioned to receive water by gravity flow from said basin, said trough having a lower panel downwardly sloped toward a second drain means which permits downward emergence of water.