Replacement Filters for the iSpring WGB21B
iSpring WGB21B
✅ Best value — replace everything at once
IPW 2-cartridge set — every replaceable stage in one order
✓ Guaranteed to fit your iSpring WGB21B
📋 Typical replacement: sediment every 3–6 months · carbon every 6–12 months
1
Sediment PP 5 micron
10×4.5 Big Blue
Replaces OEM FP15B
2
CTO carbon block
10×4.5 Big Blue
Replaces OEM FC15B
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.
