Replacement Filters for the APEC RO-45 Ultimate (5-Stage) Reverse Osmosis System
APEC · 5-Stage Reverse Osmosis
Replacement Filters for the APEC RO-45 Ultimate (5-Stage) Reverse Osmosis System
Every filter your system needs — stage by stage — using IPW house-brand cartridges that fit the standard 10" housings and cost a fraction of the OEM parts.
Also fits: APEC RO-45 · RO-45
✓ Standard 10" cartridges — guaranteed to fit
APEC RO-45 Ultimate (5-Stage) Replacement Filters
This system uses standard 10" cartridges and an 1812 membrane. Pick the exact part for each stage below.
Filters by stage
Replace each stage with the exact IPW part below.
1
Sediment pre-filter
5µm polypropylene · 10" × 2.5"
IPW 5M-SED-10×2.5 — $3.50
Replaces genuine OEM: APEC FI-SED10-C
2
Carbon block
coconut carbon block · 10" × 2.5"
IPW CBC-10-5 carbon block — $8.99
Replaces genuine OEM: APEC FI-CAB10-C
3
Carbon block (2nd)
coconut carbon block · 10" × 2.5"
IPW CBC-10-5 carbon block — $8.99
Replaces genuine OEM: APEC FI-CAB10-C
4
RO membrane
50 GPD TFC (OEM 45 GPD — closest universal)
IPW TW-1812-50 — $32.99
Replaces genuine OEM: APEC MEM-ES-45
5
Inline post-carbon polish
coconut GAC inline · ¼" quick-connect
Hydronix ICF-10Q inline — $7.99
Replaces genuine OEM: APEC FI-PHT33-QC
When to replace
🪣 Sediment & carbon: every 6–12 months💧 RO membrane: every 2–3 years
✓ Guaranteed to fit your APEC RO-45 Ultimate (5-Stage) — standard 10" cartridges & 1812 membrane.
Not sure this is your system? Use the Isopure Water Filter Finder → Match by system name, by the part number printed on your current filter, or by snapping a photo.
