Replacement Filters for the Bluonics 3-Stage 20" Big Blue Whole-House System
Bluonics 3-Stage 20" Big Blue
✅ Best value — replace everything at once
IPW 2-cartridge set — every replaceable stage in one order
✓ Guaranteed to fit your Bluonics 3-Stage 20" Big Blue
📋 Typical replacement: sediment every 3–6 months · carbon every 6–12 months
1
2
CTO carbon block 5 micron
20×4.5 Big Blue
3
Melt-blown sediment 1 micron
20×4.5 Big Blue
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.
Compatibility reference only. Photos of complete systems shown on this page are provided to help you identify your unit and confirm that our filters fit. All brand names, model numbers, and product images are the property of their respective owners; Isopure Water (IPW Industries Inc.) is not affiliated with, sponsored by, or endorsed by these manufacturers. We sell compatible replacement filters and parts — not the branded systems pictured, unless a system is separately listed for sale on our store.
