Complex sentence: Therefore, these types of toilets do require water for flushing but otherwise have many of the same characteristics as simple pit latrines and are for this reason subsumed under the term "pit latrine".
Split into simpler sentences: Therefore, these types of toilets do require water for flushing but otherwise have many of the same characteristics as simple pit latrines. For this reason they are subsumed under the term "pit latrine".