Champion Duplex Strainers Filters are excellent for applications where pipelines cannot be shut down for cleaning the filter basket. A Duplex Filter can operate continuously and never has to be shut down for cleaning. Duplex Filter has two Simplex Filters connected by way of a common flow diverter. When one filter gets clogged, the flow can be diverted through another filter.Single & Multi basket designs, Pressure Equalization Assembly, Quick Fit Closures & Cover lift Davit.