A lavatory system comprising: a lavatory comprising: a basin comprising a bottom surface , the basin configured to hold a volume of water; and a drain opening disposed in the bottom surface of the basin, wherein the bottom surface of the basin comprises a horizontally extending projection formed integrally with the bottom surface of the basin, and wherein the horizontally extending projection is disposed over the drain opening such that the drain opening is at least partially obscured from a view of a user; the lavatory further comprising a hidden chamber disposed beneath the basin, the hidden chamber comprising a fluid inlet and a fluid outlet and configured to receive a fluid flow from the drain opening of the basin; and a drain assembly comprising: an overflow pipe pipe comprising a first end and a second end, the overflow pipe pipe being moveable from a first position to a second position; and a waste in fluid communication with the fluid outlet of the hidden chamber, wherein in the first position of the overflow pipe, fluid flows from the hidden chamber into the waste without flowing through the pipe, and in the second position of the overflow pipe, fluid flow flows from the hidden chamber into the waste via the overflow pipe. a lavatory comprising: a basin comprising a bottom surface , the basin configured to hold a volume of water; and a drain opening disposed in the bottom surface of the basin, wherein the bottom surface of the basin comprises a horizontally extending projection formed integrally with the bottom surface of the basin, and wherein the horizontally extending projection is disposed over the drain opening such that the drain opening is at least partially obscured from a view of a user; a basin comprising a bottom surface , the basin configured to hold a volume of water; and a drain opening disposed in the bottom surface of the basin, wherein the bottom surface of the basin comprises a horizontally extending projection formed integrally with the bottom surface of the basin, and wherein the horizontally extending projection is disposed over the drain opening such that the drain opening is at least partially obscured from a view of a user; the lavatory further comprising a hidden chamber disposed beneath the basin, the hidden chamber comprising a fluid inlet and a fluid outlet and configured to receive a fluid flow from the drain opening of the basin; and a drain assembly comprising: an overflow pipe pipe comprising a first end and a second end, the overflow pipe pipe being moveable from a first position to a second position; and a waste in fluid communication with the fluid outlet of the hidden chamber, wherein in the first position of the overflow pipe, fluid flows from the hidden chamber into the waste without flowing through the pipe, and in the second position of the overflow pipe, fluid flow flows from the hidden chamber into the waste via the overflow pipe. an overflow pipe pipe comprising a first end and a second end, the overflow pipe pipe being moveable from a first position to a second position; and a waste in fluid communication with the fluid outlet of the hidden chamber, wherein in the first position of the overflow pipe, fluid flows from the hidden chamber into the waste without flowing through the pipe, and in the second position of the overflow pipe, fluid flow flows from the hidden chamber into the waste via the overflow pipe. <EOS>