Whale Gulley IC Large Waste Water Outlet [SG1982B]Gulley IC Large Waste Water Outlet Single outlet shower drain gulley with intelligent control built in. This product must be used with a Gulper IC since the Gulley IC is connected to a Gulper IC. When the gulley senses water, it sends an electrical signal to the gulper IC, which evacuates the system. As the water level decreases, the electrical signal transmitted by the gulley will cease. Gulper IC will continue to operate for a further 15 seconds