Leo ran upstairs and closed the bathroom tap. Then he went back to the kitchen, reconnected the pipe, and turned on the kitchen tap.
Higgins did. The water had nowhere to go because the rag was blocking the spout. It couldn’t flow out, so it did the only thing it could: it flowed backwards down the hot water pipe, pushing the airlock all the way back to the tank. how to unblock an airlock in water system
Higgins shrugged.
Leo grabbed a short length of garden hose and a pair of washing machine connectors. “We need a bridge,” he said. Leo ran upstairs and closed the bathroom tap