Replacement Filters for the iSpring WGB21BM

iSpring · Whole-House Big Blue

Replacement Filters for the iSpring WGB21BM

Every cartridge your system needs — stage by stage — matched to the IPW house-brand parts that fit and cost less than the branded packs.

WGB21BM (2-stage iron/manganese, 10")

iSpring WGB21BM (2-stage iron/manganese, 10") replacement filters
✓ Direct-fit IPW set — guaranteed to fit

IPW 2-Stage Set

$112.49complete set

One order covers every replaceable cartridge stage. Guaranteed to fit your WGB21BM.

🛒 Add the complete set to cart

Filters by stage

Buy the set above, or replace stages individually below.

1
CTO carbon block
10" × 4.5" Big Blue
Add IPW CBC-10-BP-5 $19.99Replaces OEM FC15B
2
Iron & manganese reducing
10" × 4.5" Big Blue
Add IPW IF-SM-KDF85010B $92.50Replaces OEM FM15B
💧 Carbon: every 6–12 months, or when taste/odor returns
🧲 Iron / KDF cartridge: every 12 months (sooner with high iron or sulfur)

✓ Cross-referenced to fit your iSpring WGB21BM.

Not sure this is your system? Use the Isopure Water Filter Finder → Match by system name, by the part number printed on your current cartridge, or by snapping a photo.