180 sq. ft. Purex DM Cartridge Filter C-8405 FC-1973 Diameter…………………………………8-7/8" Length……………………………………39" Top End Cap: id/config……………..4" / open Bottom End Cap: id/config…………4" / open The filter cartridge is used on: Pentair Pool Prod, OEM P/N R173582, 178571 DM-180 Filter

52 sq. ft. Sta-Rite 50TX, 50GPM-TX, 50TXR, T-50TX, T-50TXR, PTM50 Cartridge Filter UHD-SR50 FC-2530 Diameter…………………………………8-11/16″ Length……………………………………13-5/16″ Top End Cap: id/config……………..4-3/16″ / open Bottom End Cap: id/config…………4-3/16″ / open with 12 concentric slots The filter cartridge is used on: Sta-Rite, OEM P/N WC108-56S2X Posi-Flo 50GPM-TX Posi-Flo 50TX Posi-Flo 50TXR Posi-Flo T-50TX Posi-Flo T-50TXR Posi-Flo II PTM50

125 sq.ft. Sundance Spa Cartridge Filter C-8325 FC-2790 Diameter…………………………………8-7/16" Length……………………………………18" Top End Cap: id/config……………../ closed with 3-step edge Bottom End Cap: id/config…………2-1/2" / open with beveled edge Note: Length recorded is measured to first step. Replacement for 18" to 18-1/2" overall length. The filter cartridge is used on: Sundance Spas Universal Length, OEM P/N 6540-490

137 sq. ft. Sta-Rite 135TX, 135GPM-TX, 135TXR, PTM-135 Cartridge Filter UHD-SR137 FC-2570 Diameter…………………………………8-11/16" Length……………………………………31-1/4" Top End Cap: id/config……………..4-3/16" / open Bottom End Cap: id/config…………4-3/16" / open with 12 concentric slots The filter cartridge is used on: Sta-Rite, OEM P/N WC108-70S2X Posi-Flo II PTM135 Posi-Flo 135GPM-TX Posi-Flo 135TX Posi-Flo 135TXR

72 sq. ft. Sta-Rite 70TX, 70GPM-TX, 70TXR, T-70TX, T-70TXR, PTM70 Cartridge Filter UHD-SR70 FC-2540 Diameter…………………………………8-11/16″ Length……………………………………18-3/16″ Top End Cap: id/config……………..4-3/16″ / open Bottom End Cap: id/config…………4-3/16″ / open with 12 concentric slots The filter cartridge is used on: Sta-Rite, OEM P/N WC108-57S2X Posi-Flo II PTM70 Posi-Flo T-70TX Posi-Flo T-70TXR Posi-Flo 70GPM-TX Posi-Flo 70TX Posi-Flo 70TXR

120 sq.ft. Sundance Spa Cartridge Filter C-8320 FC-2750 Diameter…………………………………8-7/16" Length……………………………………18-1/8" Top End Cap: id/config……………../ castle Bottom End Cap: id/config…………2-1/2" / open with beveled edge Note: Length recorded is measured to first step. Replacement for 18" to 18-1/2" overall length. The filter cartridge is used on: Sundance Spas Universal Length, OEM P/N 66540-482 Crystal Waters Spas (Canada)

102 sq. ft. Sta-Rite 100TX, 100GPM-TX, 100TXR, T-100TX, T-100TXR, PTM100 Cartridge Filter UHD-SR100 FC-2550 Diameter…………………………………8-11/16″ Length……………………………………25-11/16″ Top End Cap: id/config……………..4-3/16″ / open Bottom End Cap: id/config…………4-3/16″ / open with 12 concentric slots The filter cartridge is used on: Sta-Rite, OEM P/N WC108-58S2X Posi-Flo T-100TX Posi-Flo T-100TXR Posi-Flo 100GPM-TX Posi-Flo 100TX Posi-Flo 100TXR Posi-Flo II PTM100

50 sq.ft. Vita Spa Cartridge Filter C-8350 FC-3053 Diameter…………………………………8-1/2″ Length……………………………………7-1/4″ Top End Cap: id/config……………..1-9/10″ / open Bottom End Cap: id/config…………2-3/8″ / open with slots The filter cartridge is used on: Pleatco Vita Spas, OEM P/N PVT 50W Note: Unicel replacement requires injection molded knob handle (not furnished).

135 sq. ft. Sta-Rite T-135TX (Posi-Flo) Cartridge Filter UHD-SR135 FC-2560 Diameter…………………………………8-11/16″ Length……………………………………34-1/2″ Top End Cap: id/config……………..4-3/16″ / open Bottom End Cap: id/config…………4-3/16″ / open with 12 concentric slots The filter cartridge is used on: Sta-Rite, OEM P/N WC108-59S2X Posi-Flo T-135TX Note: Product discontinued by Sta-Rite. Replacement fits stainless steel tank only.