The reredorter complex at the southern end of the east range served dual purposes in the abbey’s daily life. The upper floor functioned as the monks’ communal latrine, a large chamber with convenient access from the dormitory and individual stalls along the south wall. This sophisticated sanitation system directed waste through openings into a vaulted stone passage below, where an underground stream carried it away—an impressive feat of medieval engineering. The lower level presents an architectural puzzle: a vaulted hall equipped with a grand thirteenth-century hooded fireplace and its own garderobe, likely serving as the monastic infirmary. This arrangement was highly unusual for a Cistercian house, which typically built separate infirmary complexes east of the main buildings around a second cloister, complete with kitchens, chapel, and support facilities. No such complex has been discovered at Netley through excavation, suggesting an unconventional approach to caring for sick monks. Adjacent to the reredorter stood the buttery, where wine—some supplied directly from the king’s cellars at Southampton—and beer were stored, while fragmentary remains nearby hint at a possible separate kitchen for preparing the richer diet permitted to recovering brothers.