Pacfab 355329 O-Ring Replacement - O-419

The O-419 Pentair Pacfab o-ring is the replacement o-ring for Pentair Challenger and Pentair WaterFall specialty pumps. It measures 10-1/2 inches in diameter and is a compatible replacement to 355329. O-rings can crack and wear over time, which can cause air and water leaks inside of pool pumps, which can damage pool equipment.