​  ​Archaeological excavations at the Otyrar settlement revealed the existence of an underground pipeline system designed to discharge domestic wastewater and rainwater beyond the city limits. The individual pipes measured approximately 1 meter in length and had a diameter ranging from 30 to 40 centimeters. 
   The pipeline network extended from the central part of the city — the main thoroughfare — to the dead-end streets. Such an engineering design helped prevent flooding during heavy rains and ensured the timely removal of wastewater. 
     Overall, this system of underground pipes, also found in other ancient cities such as Otyrar, Sauran, and Taraz, demonstrates the advanced level of engineering infrastructure and the high standards of sanitation maintained by the urban population during the medieval period.