The Pulsar® 71563 PVC Elbow for Pulsar® 3 Pool Maintenance System is an operating repair / replacement component for compatible pool water maintenance systems. This component is designed to work with the Pulsar® 3 pool maintenance system, as well as feeder model numbers 30025 and 30991. For best results, always refer to manufacturer directions for repairing, replacing, or adding components to pool maintenance systems.