The Carvin Splash Pak cartridge filter lock ring is designed for compatible CE cartridge filter applications where major assembled sections need dependable retention. A lock ring is useful because it helps hold the filter body together securely, supporting both structural stability and cleaner sealing performance.This replacement is especially useful when the original lock ring is cracked, warped, weakened, or no longer tightening with confidence. Replacing it can help restore a more secure filter body and improve the overall feel of the assembly after service.The 42372300R is a practical replacement for compatible Carvin or Jacuzzi Splash Pak cartridge filters that need renewed locking support and cleaner assembly integrity. Carvin Splash Pak cartridge filter lock ring Designed for compatible CE filter body retention Helps secure major assembled sections together Useful when the original lock ring is damaged or worn Supports cleaner and more dependable filter fitment