Well liners and inserts are smaller diameter pipe inserted into an existing well to filter out sand, block off water or extend casing when deepening a well. Well liners and inserts work independently from the well’s casing, and water producing parameters should be adjusted to meet pipe openings and strength standards for inflow velocities and pressure. This means the pumping rate should be reduced or a liner or insert will eventually clog and fail. The big mistake often made with liners and inserts is believing you solved a sand problem when all you are doing is creating a bigger problem down the road. Smaller diameter pipe that has less water entrance area plugs and wares out at a much faster rate than the original casing. There is a big advantage with using stainless steel screen they have more water area, resist plugging, incrustation build up and clean easily. Always keep in mind water enters the well from static head pressure and adding liners, inserts or even a downhole separator does not change that. The best recommendation for well liners and inserts is design them for a specific need, make them short and seal them in place using a hydraulic swage, leaving the rest of the well to produce unrestricted.