2 pk Culligan OR-34A, OR-34 Whole House Filter O-Ring Kit Replacements 2 pk Culligan OR-34A, OR-34 Whole House Filter O-Ring Kit Replacements The Culligan OR-34A O-ring 2-pack, which includes both the older and new OR-34 , OR-34A Replace your O-Ring with every 3rd filter change to prevent leaks Quality Replacement parts by TORK