Vu-Flow VuFlow Sump 11/2 NT 60 SC 60 Mesh (254 Micron) 1 1/2″ Polyester Screen Replacement For NT, Combo or RNT Filter Elements. Just flush clean and reuse the filter screen cartridge over and VuFlow Sump 11/2 over again. Great for wells, irrigation, sprinklers, valves, pumps and sand filtration. If you have well water or high suspended sediment in VuFlow Sump 11/2 your water you will love these cleanable and reusable spin down screen water filters.