Aladdin O-497 - O-RingAladdin O 497 O Ring is a replacement filter tank O ring for Pentair Clean & Clear, Clean & Clear Plus, FNS Plus, Quad DE, Titan, and 5000 Series filters. It replaces It seals the tank connection to help prevent pressure loss, air leaks, and water leakage during operation. This is a common service seal used when the original tank O ring has become flattened, cracked, or brittle. Key Features: Filter tank seal Replaces Pentair 39010200 Clean & Clear