Replacement Filters for the Generic (builder) 2-Stage 20" Big Blue Whole-House System
Generic (builder) 2-Stage 20" Big Blue
✅ Best value — replace everything at once
IPW 2-Stage Big Blue Set — fits standard 20"×4.5" housings
✓ Guaranteed to fit your Generic (builder) 2-Stage 20" Big Blue
📋 Typical replacement: sediment every 3–6 months · carbon every 6–12 months
1
Sediment (dual-gradient/spun PP) 5 micron
20×4.5 Big Blue
Replaces OEM DGD-5005-20 (or Hydronix SDC-45-2005)
2
Carbon block (coconut) 5 micron
20×4.5 Big Blue
Replaces OEM EP-20BB / CBC-20BB (or Hydronix CB-45-2005)
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.
