Replacement Filters for the Express Water RO5DX Reverse Osmosis System
Express Water · 5-Stage Reverse Osmosis
Replacement Filters for the Express Water RO5DX (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: Express Water RO5DX · RO5DX · Express Water 5-stage
✓ Standard 10" × 2.5" cartridges
Express Water RO5DX (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: Express Water sediment filter
2
GAC carbon
granular activated carbon · 10" × 2.5"
IPW UDF-10 GAC carbon — $7.99
Replaces genuine OEM: Express Water GAC filter
3
Carbon block
coconut carbon block · 10" × 2.5"
IPW CBC-10-5 carbon block — $8.99
Replaces genuine OEM: Express Water carbon block filter
4
RO membrane
50 GPD thin-film composite
IPW TW-1812-50 — 50 GPD membrane — $32.99
Replaces genuine OEM: Express Water 50 GPD membrane
5
Inline post-carbon polish
10" × 2" coconut GAC inline · ¼" quick-connect
Replaces genuine OEM: Express Water inline post-carbon filter
When to replace
🪣 Sediment & carbon: every 6–12 months🥤 Inline post-filter: every 12 months💧 RO membrane: every 2–3 years
✓ Fits the Express Water RO5DX with standard 10" × 2.5" housings, an 1812 membrane and ¼" tubing — not sure? call (714) 541-6600.
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.
Express Water RO5DX filter FAQ
What filters does the Express Water RO5DX use?
Five stages: a sediment filter, a GAC carbon filter and a carbon block (all 10" × 2.5"), a 50 GPD 1812 membrane and an inline coconut carbon post-filter with ¼" quick-connects.
How often should I change the RO5DX filters?
Change the sediment and carbon filters every 6 to 12 months and the inline post-filter about once a year. The membrane usually lasts 2 to 3 years.
Will the IPW filters fit my RO5DX?
Yes, if your housings take standard 10" × 2.5" cartridges. Check the size printed on your old filter, or call (714) 541-6600 and we will match it.
All replacement filters by system · Express Water ROALK10 Alkaline · iSpring RCC7 · Reverse osmosis membranes
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.
