• For models prior to 2004 using the thinner 3/32" thick o-ring
• Need thicker 1/8" o-ring? Order 19-2320
• This is for the Outer o-rings not inner, be sure to check your MFG# prior to ordering

Outer O-Ring bulkhead replacements Fits FNS and FNS Plus pool/spa D.E. filter models FNS 24, FNS 36, FNS 48, FNS 60, FNSP24, FNSP36, FNSP48, FNSP60 Also fits Pentair Nautilus and Nautilus Plus pool D.E. filters models NSP24, NSP36, NSP48, NSP60, NSP72 Also compatible with Clean & Clear Plus cartridge filter models CCP240, CCP3201, CCP4201, CCP5201 FNS plus made of buna N 70 shore