Culligan OR-34A Filter Housing O-Rings VC (Pack of 25 Each)

(25 Each O-Rings total in package) Sterling Seal & Supply exact replacement O-Rings for Culligan Water Filters numbered OR-34A. This O-ring package includes 10 each O-rings labeled A. Which O-Ring do I choose? Before replacing the O-ring, refer to the bottom of the sticker on of your Culligan filter housing. Two different O-ring sizes are used for model 34 and 34A: Sticker plates coded "Rev C" or higher, for models HF-150A, HF-360A, and Ace 45025 housings should use the smaller O-ring, enclosed in this package. Sticker plates coded "Rev A" or "Rev B" for models HF-150A and ALL other models (HF-160, HF-360, HF-365, Ace 45025, Ace 46764, Ace 49560) should use the larger O-ring. NOT ENCLOSED IN THIS PACKAGE. Over time the O-ring that comes with your filter housing will wear down and may leak so you should replace your O-ring after every 3rd filter change. Sterling Seal Replacement Culligan34A water filter housing O-Rings fit Culligan Whole House Filters and Ace whole house water filter systems including HF-150, HF-160, HF-360, 45025, 46764, and 49560. The O-ring installation process is incredibly easy. To install the O-ring, remove the old O-ring and clean out the groove with a clean cloth. Lubricate the new O-ring with clean/new silicone grease. Press the O-ring into groove with two fingers, ensuring that it sits flat and level in the groove. ? Sterling Seal Replacement O-Rings fit Culligan OR-34A and can be used in some of the following models; Ace Hardware, American Plumber, Ametek, Master Plumber, Pentek, and US Filter Plymouth Products. Inquire to bsolomon@sterlingseal, com if questions for size confirmation for your units. This O-Ring has a nominal size of  3-3/4”ID x 1/8” cross section x 4” OD.