Whale 2-Way Waste Manifold 6 Cable 3/4" Ports [WM1982B]2 Way Waste Manifold 6' Cable 3 4" Ports The 2 way manifold with Whale Intelligent Control built in. The IC manifold can be used with a Whale Gulper pump to create a grey water disposal system. The manifold accepts two waste inputs and senses water through the wall. This relays information to the Gulper IC pump to turn on and pump the wastewater.