K4 OmniFilter Replacement O-Ring Set

The OmniFilter K4 O-Ring set fits the following Omni water filter systems:

• CBF1
• CBF3
• CBF20
• OB1
• OB3
• OB5
• OT32
• R12
• R14
• SFM2
• RO2000
• RO2000-TDS

The set contains 4 O-Rings

• 1 Blue for Undersink Filter Systems - O-Ring Size: 3-1/2" (inside diameter) X 3-3/4" (outside diameter)
• 1 Black for Medium Duty Whole House Systems - O-Ring Size: 4-7/8" (inside diameter) X 5-1/8" (outside diameter)
• 2 Black for Medium Duty Whole House Systems - O-Ring Size: 3-7/16" (inside diameter) X 3-5/8" (outside diameter)

Time and exposure to water, air, etc. can slowly deteriorate the O-ring material, causing it to become hard & brittle, allowing tiny cracks to form. These cracks eventually grow, the O-ring fails, and you end up with a leak.

We recommend replacing your O-rings with every 3rd filter change - especially if your filter system is installed in a place where leaks could cause water damage.

In-between O-ring changes, you can extend the life of your O-rings with our Food-Grade Silicone O-ring Grease. The grease is non-toxic, safe, and designed specifically to improve sealing & increase the life of O-rings used in water filter systems.