Culligan Inc OR-34 Housing O-ring Water Filter

Product Description

The CULLIGAN INC OR-34 is a replacement housing O-ring sized for 0.75-inch filter housings used in residential and light commercial water filtration systems. This elastomer seal fits between the filter housing cap and the sump, preventing bypass leakage and maintaining system pressure integrity. It is a straightforward consumable part that should be replaced any time the housing is disassembled for cartridge service or when the existing O-ring shows cracking, deformation, or signs of a weeping joint. Licensed plumbers and experienced water treatment technicians are the primary installers, though knowledgeable DIYers familiar with whole-house filtration systems routinely perform this service.

This O-ring is specified for use with the Culligan HF-150A filter housing and the Culligan HF-360 filter housing. It is sold individually and is a direct OEM-referenced replacement for maintaining a watertight seal in those filter assemblies. Replacing this seal during routine cartridge changes is a low-cost preventive measure that protects downstream plumbing and equipment from unfiltered water bypass.

Key Features

• OEM-referenced replacement O-ring for Culligan 0.75-inch filter housings
• Seals the housing cap-to-sump joint to prevent pressure loss and bypass leakage
• Compact profile: approximately 1.58 inches tall, 1.08 inches wide, and 0.1 inches thick
• Lightweight at 0.02 pounds, designed as a routine consumable replacement part
• Sold individually (unit of measure: each)

Compatibility

Designed for use with the Culligan HF-150A filter housing and the Culligan HF-360 filter housing, as specified by the manufacturer.

Installation Notes

Shut off the water supply and relieve system pressure using the housing relief button before disassembling the filter housing. Remove the old O-ring and clean the groove thoroughly before seating the new OR-34 to ensure a flat, even fit with no twisting. A light coating of food-grade or NSF-approved silicone grease on the O-ring is standard practice to ease installation and extend seal life. After reassembly, restore pressure slowly and inspect the joint for leaks before returning the system to service.