Logan ManifoldLogan Manifold Makes Material Change Over Easy Whether you're changing over open cell foam, closed cell foam, or Polyurea the Logan Manifold helps to easily transition material with little to no waste. This adaptor saves contractors $175, on average, every time material is changed over. Most applicators use water or other materials to purge their hose, spray guns, and other equipment while changing material. This process can be a costly transition.