OmniFilter Replacement K4 O-Ring fits all OmniFilter Whole House and Undersink water filters (except U24, U25, U26, BF7, OB1 & OB5), including models CBF1, CBF3 Series A, CBF20, OB3, OB5, OT32 Series A, Omni Super, Omni Deluxe, Omni Regular, OT5, RO2000, ROT2000-TDS, R12, R14, SFM2 Series A, Total 2, Total Plus, UC2, U400, U450, U500, U600, U700
DOES NOT FIT: U24, U25, U26, OB1, OB5, BF7O-Ring Set Includes:
- (2) Blue O-rings measures 3-1/2″ Inside Diameter x 3-3/4″ Outside Diameter fits new style housings
- (2) Black O-rings measures 3-7/16″ Inside Diameter x 3-5/8″ Outside Diameter for old style model
