The X-shaped intersecting ducts have a structural defect in engineering because of extra ducts at both the confluent and branching sides. However, the results are interesting when researchers apply the characteristics of flow around the intersecting region with the use of newly developed apparatuses. Experiments are performed to investigate the flow rates around the intersecting region by changing the condition of upper water levels. It is found that the Coanda effect occurs in the flow of the intersecting ducts. It is also disclosed that the flow rates in the intersecting ducts become greater under the influence of suction in the upper duct during which the water is cut off from the supply.