About This

• 4 Different O-ring：This K4 O-ring kit includes K4, OK30, OK40, WC9-13 filter housing seal O-ring. K4 O-ring replaces K4-4PAK, K4-R, K4-04, K4-DC6-S18; OK30 O-ring replaces 151121, OR-38, W38-OR, 152031. Fits select undersink, drinking water, RO, standard whole-house, legacy filter housing, helping reduce size-selection errors across different housing revisions
• K4 & OK30 O-Ring：The K4 O-ring is compatible with OMNIFilter undersink water filter housing CBF1, CBF3 Series A, CBF20, OB1, OB3, OT32 Series A, SFM2 Series A, RO2000 early models, R14, U26 Series A, U30. The OK30 / 151121 O-ring is compatible with OMNIFilter slim-line undersink filter housing CBF1 Series A, CBF3 Series B, OT32 Series B, SFM2 Series B, RO2000 Series B
• OK40 & WC9-13 O-Ring：The OK40 O-ring is compatible with OMNIFilter legacy or larger standard whole-house water filter housing OB1 Series A, OB5 Series A, R12 Series A, U25 Series E. The WC9-13 O-ring is compatible with OMNIFilter legacy, white-head, older special housing OB5 White-Head, OCT2
• More Compatibility：The OK30 O-ring is compatible with Culligan US-316, US-550, RVF-10. Replace 151121, OR-38, W38-OR, 152031 O-ring. The multi-size O-ring kit is compatible with DuPont WFDW12009W, WFDW12000, WFDW13000, WFCH1 filter housing
• Size：K4 O-Ring: 3.48" ID × 0.14" CS; OK30 O-Ring: 3.36" ID × 0.14" CS; OK40 O-Ring: 3.86" ID × 0.14" CS; WC9-13 O-Ring: 3.28" ID × 0.10" CS；Some models use different O-ring sizes by series or revision. This kit covers multiple filter housing styles, series, and generations. Verify your filter housing model, series, seal-groove, O-ring size before ordering
• Filter Housing Seal：This water filter housing O-ring creates a watertight seal between the filter head and the filter bowl/housing. Choosing the correct O-ring size helps maintain the filter housing seal and helps reduce dripping or leakage caused by the seal gasket during filter changes or routine maintenance
• Package Include：Includes 2 × K4 O-rings, 2 × OK30 O-rings, 2 × OK40 O-rings, and 2 × WC9-13 O-rings. 8 O-rings total (2 of each)

Overview

• Nominal Inside Diameter : 3.48 inches
• Brand : Anvpkun
• Color : Black
• Manufacturer : Anvpkun
• Unit Count : 8 Count