The lock ring on an XStream filter helps hold the tank assembly securely closed while the system is under pressure. This Hayward lock ring with safety latch is a replacement part for compatible XStream filter applications where the original ring or latch is damaged, difficult to operate, or no longer securing properly.Because filter closure hardware is directly tied to safe operation, worn lock rings should not be ignored. Replacing the assembly helps restore the intended tank closure method and gives service technicians a cleaner, more reliable fastening point during routine filter maintenance. Replacement lock ring with safety latch for compatible XStream filters Helps secure the filter tank assembly Useful when original closure hardware is worn or damaged Supports safer, more dependable filter servicing Hayward part number CCX1000D