Description Pentair WhisperFlo®/IntelliFlo® Pump Lid O-Ring (New Style) – Contractor Pack (10) New Style Lid O-Ring for Pentair® WhisperFlo®/IntelliFlo® Pool Pump Replacement for Pentair®/Purex® WhisperFlo® pump lid o-ring (After 11/98), fits the newer style Pentair®/Purex® Whisperflo® pump lid, as well as the Pac Fab® old style Challenger®. For Use With Following O-318 applications: Pentair®/Purex® Whisperflo® pump lid (After 11/98) Pac-Fab® Challenger® (Old Style) Pentair® 700 HydroPump lid (U9-229 352600) SMF® PUMP Lid For Use With Following O-218 applications: Sta-Rite® Dura-Glas® Trap Cover Sta-Rite® Max-E-Glass® Trap Cover Replaces Part No: 350013 O-218 O-318 O-318 ALA 355332 PAF ALA-601-5489 U9-229 352600 U9229 STA 351021376 HRZ O-218 ALA