Replacement Filters for the Watts OneFlow OF210-1 / OF110-1 2-Stage Whole-House System
Watts OneFlow OF210-1 / OF110-1
✅ Best value — replace everything at once
IPW 1-cartridge set — every replaceable stage in one order
✓ Guaranteed to fit your Watts OneFlow OF210-1 / OF110-1
📋 Typical replacement: carbon every 6–12 months
1
Scale-prevention TAC media cartridge
10×2.5
No IPW drop-in for this proprietary stage
OEM OF110RM
2
Carbon block (OF210 version)
10×2.5
Replaces OEM OF110RC / OF210RC
Not sure this is your system? Use the Isopure Water Filter Finder → Match by system name, by the part number on your cartridge, or by photo.
