This Pentair/Sta-Rite replacement is built for DE filter service and helps replace the air bleed filter used on DES, DEP, DEPB, HRP, and HRS assemblies. It helps manage trapped air and fine material at the filter top, making it a practical choice when the original part is cracked, worn, leaking, stripped, brittle, or missing. It is especially useful for targeted repairs where replacing a larger pump, filter, or cleaner assembly is not necessary.Confirm the part number, model family, horsepower, size, and pre/post production notes before ordering. Small Sta-Rite and Pentair revisions can affect fit, especially on DuraGlas, DynaGlas, Cristal-Flo, GW cleaner, and DE filter systems. OEM-style fit for compatible equipment Supports dependable sealing, flow, alignment, or cleaner movement Good for rebuilds, service calls, and preventative maintenance