The toilet was near the entrance to the baths. It was 3.20 meters wide, and a bench with openings (width 0.50 m., height 0.40 m.) ran around three of its sides. Below the bench, the drain to remove waste water extended along the length of the walls. It was 0.45 meter wide, 1 meter deep, and its floor was constructed of bricks (28.3 x 42.7 cm.) bearing fingerprints. One of its faces, which also served as the base of the walls, was of brick, while the other was built of well-dressed stonework 0.50 meter wide. Both faces were coated with hydraulic mortar. The sewer was continuously supplied with water from a built stone channel (width 0.30 m., depth 0.50 m.). This channel, which came from the northeast, ended at the beginning of the sewer’s east side below the floor of the large hall. The floor of the sewer was built on an incline to secure the flow of water towards the palace’s drainage channel, through an opening (width 0.50 m., height 0.60 m.) located at the north end of the west wall. The wall itself was reinforced above the opening with a brick relieving arch.
Water from the emptying of the bathtubs as well as from the rooms north of the vestibule flowed into the sewer through channels of various types. Specifically, the water from the hexagonal and the semi-circular tub reached the sewer from below the floors through a built channel which passed through the walls of the rooms. Over the course of the long period during which the baths operated, this channel was repaired on many occasions. Its floor was overlaid with bricks, some of which carry embossed stamps, normally in the form of letters. The channel’s walls, which were constructed of brick or stone, were coated with hydraulic mortar. The drainage channel was covered by bricks or stones.
