Replacement O-ring kit for sand filter pumps and combos Includes - 1 tank O-ring for 12- and 14-inch sand filter pumps and combos (11379) - 1 drain valve O-ring for sand filter pump and combo (11385) Why you need it - Restores a proper seal to prevent leaks and maintain correct pressure in your sand filter system - Supports reliable pump operation and filtration performance by replacing worn O-rings What makes it compatible and reliable - Specifically designed for 12- and 14-inch sand filter pumps and combo units - Uses the listed part numbers (11379 for the tank O-ring; 11385 for the drain valve O-ring) to ensure correct fit How to use - Replace worn or damaged O-rings during routine maintenance or after system disassembly for cleaning or repair - Suitable for quick resealing of both the tank and the drain valve areas in compatible pumps and combos Use scenarios - Routine maintenance on a residential pool with a 12" or 14" sand filter pump to prevent leaks - Replacing worn O-rings after disassembling the filter for cleaning, backwashing, or sand replacement - Seasonal service to ensure the pump and drain valve seals remain intact and leakage-free