Rosedale Products Inc., of Ann Arbor, Mich., announces the use of In-line Separators as a pre-filter. They have proven successful in the oil and petrochemical industries removing heavy solids from produced water. The separator is positioned prior to polishing filters, extending the life of fine filtration systems. Overall filter use, inventory and disposal costs are significantly reduced. The separators employ a unique combination of centrifugal action and gravity and are ideal for removing grit, sand and other solids.