Lena climbed down. The pump house was a cathedral of noise—motors thrumming, bearings whining—but the main outlet pipe was cold and still. She traced it with her fingers. The airlock was a ghost, but she could feel its shape in the system’s refusal to live.
Lena, the district’s water warden, stood on the catwalk circling its iron belly, a stethoscope pressed to the riveted steel. Nothing. Not the gurgle of inflow, not the whisper of outflow. Just the dry, hollow echo of her own knocking. airlock in water tank
Elias leaned on the rail, breathing hard. “That was just… air.” Lena climbed down