These replacement rotors fits ProLine™ Hy-Drive Skimmers pumps. SKU UPC Code Compatible Pump 21105 025033211056 ProLine Hy-Drive Skimmer Pump 1400 (#20350) 21010 025033210103 ProLine Hy-Drive Skimmer Pump 2550 (#20355) 21110 025033211100 ProLine Hy-Drive Skimmer Pump 5100 (#20360) 21025 025033210257 ProLine Hy-Drive Skimmer Pump 6600 (#20365) Manufacturing impellers often includes trimming on a lathe to achieve balance and/or testing to ensure quality. Consequently, many new impellers appear used. Our impellers are brand new; any wear is due to the manufacturing process. Tip: When changing an impeller, a frequent reason for problems is mineral build up way down inside the impeller housing which causes wear and tear on the impeller and friction against the impeller which can cause overheating and intermittent operation. We strongly recommend cleaning out the well which houses the impeller with vinegar and an old toothbrush to eliminate mineral build up before installing the new impeller.
