OK25 OmniFilter Replacement O-Ring - Buy Today at FridgeFilters.com

What does it fit?

When should I
replace my O-ring?

Filter System
Compatibility Chart

The OmniFilter OK25 O-Ring fits the following Omni water filter systems:

U25 Series A
U26
U27

The OK25 is 3-3/4" (inside diameter) X 4-1/8" (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.

Omni Filter System	Replacement Filter	Tank Wrench	O-Ring
BC1	CB1	OW1
BF7	RS6 or TO6 or CB6	OW6	OK7
CBF1	CB1	OW1	K4
CBF3 Series A	CB3	OW1	K4
CBF20	CB20	OW1	K4
F1	FRC1-D	---	---
Omni Regular	RS1 or RS2 or RS3 or RS4 or RS7 or TO1	OW1
Omni Super	GAC1	OW1
Omni Deluxe	GAC1 and CB3	OW1
OB1	RS1 or RS2 or RS3 or RS4 or RS7 or TO1	OW1	K4
OB3	GAC1 or CB1 or CB3	OW1	K4
OB5	RS1 or RS2 or RS3 or RS4 or RS7 or TO1	WC79-2P	K4
OT2	GAC1 and CB3	OW1
OT32 Series A	RS2 and CB3	OW1	K4
RO2000 & RO2000-TDS	Pre-Filter: RS4 Main-Filter: CB3 Membrane: OM1 Post-Filter: R200	OW1	K4
R12	RS1 or RS2 or RS3 or RS4 or RS7 or TO1	OW1	K4
R14	RS1 or RS2 or RS3 or RS4 or RS7 or TO1	OW1	K4
SFM2 Series A	GAC1	OW1	K4
TC3	CB3	OW1
Total 2	GAC1 and CB3	OW1
Total Plus	RS2 and GAC1 and CB3	OW1
UC2	GAC1 and GAC1 (uses 2)	OW1
U24	RS1 or RS2 or RS3 or RS4 or RS7 or TO1	OW1
U25	RS1 or RS2 or RS3 or RS4 or RS7 or TO1	OW2	OK25
U26	RS1 or RS2 or RS3 or RS4 or RS7 or TO1	OW2	OK25
U27	RS1 or RS2 or RS3 or RS4 or RS7 or TO1		OK25
U400	GAC1	OW1
U450	CB1	OW1
U500	GAC1 and CB3	OW1
U600	GAC1 and CB3	OW1
U700	GAC1 and CB1 and CB3	OW1

Product Code
OK25

Product UPC
047087201098