On the southern side of the large central courtyard, a series of service areas are visible, some of which have mosaic floors. Among these spaces it is possible to identify latrines. In particular, the one located in the southwest corner of the complex, with a circular plan, still retains the pavement made of marble slabs and the counter shutter with the perforated top suspended on the drainage channel. Behind these rooms there was the exhaust system of the large circular tank consisting of a brick pipe and equipped with inspection wells.