Pentair WC8-126Z Air Bleed Replacement Kit Sta-Rite Pool and Spa Filter Air bleed replacement kit Fits Pentair Sta-Rite Posi-Flo II PTM series cartridge filter models PTM50, PTM70, PTM100 Also fits Pentair Sta-Rite D.E.P. series filter element assembly models DEP36, DEP36-1, DEP36-01B, DEPB36, DEPB36-1N, DEP51, DEP51-01, DEP51-01B, DEPB51, DEPB51-1N Also compatible with Pentair Sta-Rite D.E.P. series filter element assemblies models DEP83, DEP83-01, DEP83-01B, DEPB83, DEPB83-1, DEPB83-1N Measures 5-inch length by 7-inch height by 1-inch width