Replacement O-ring set for sand filter pumps and combos (parts 11379 and 11385) Key benefits - Stops leaks and restores a watertight seal at the tank and drain so your filter holds pressure and runs efficiently. - Minimizes downtime by replacing worn seals quickly during routine maintenance or emergency repairs. - Simple, direct replacement parts—no modification required when used with compatible equipment. What’s included and compatibility - 1 tank O-ring sized for 12 and 14 inch sand filter pumps and combo (part 11379) - 1 drain valve O-ring for sand filter pump and combo (part 11385) - Designed for use with 12-inch and 14-inch sand filter tanks and compatible pump/combo assemblies. Confirm fit using tank diameter and the part numbers above. Function and performance - Each O-ring restores the sealing surfaces at the tank and drain valve to prevent water loss and maintain filter pressure. - Fits as a direct replacement to address common wear issues such as flattening, cracking, or deformation that cause leaks. Practical use scenarios - Service and maintenance: Replace the tank O-ring (11379) when removing the multiport valve for seasonal cleaning to ensure the top seal remains leak-free. - Emergency repair: Swap the drain valve O-ring (11385) poolside to stop drips or leaks at the drain and avoid losing water or pressure. - Spare parts for technicians: Keep this compact set on service trucks or in your parts bin to quickly fix common sealing issues during field service calls. Quick notes for best results - Inspect sealing surfaces and grooves for debris or damage before installing new O-rings. - Verify compatibility by matching your tank diameter (12 or 14 inch) and the part numbers 11379 (tank O-ring) and 11385 (drain valve O-ring). Reliable replacement parts to maintain proper sealing and performance for compatible 12 and 14 inch sand filter pumps and combos.