Replacement Filters for the Olympia OROS-75 (5-Stage) Reverse Osmosis System
Olympia Water Systems · 5-Stage Reverse Osmosis
Replacement Filters for the Olympia OROS-75 (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: Olympia OROS-75 · OROS-75
✓ Best value — one universal set replaces all 5 stages
IPW Universal 5-Stage Set (75 GPD · ¼" quick-connect)
$52.99
5µm sediment + two 5µm carbon blocks + 75 GPD membrane + ¼" quick-connect inline post-filter. Standard 10" cartridges that fit the Olympia 5-stage housings.
🛒 Add the complete set to cartFilters by stage
Buy the whole set above, or replace stages individually below.
1
Sediment pre-filter
5µm polypropylene · 10" × 2.5"
IPW 5M-SED-10×2.5 — $3.50
Replaces genuine OEM: Olympia OROS-PRESF
2
Carbon block
5µm coconut carbon block · 10" × 2.5"
IPW CBC-10-5 carbon block — $8.99
Replaces genuine OEM: Olympia OROS-PRECB
3
Carbon block (2nd)
5µm coconut carbon block · 10" × 2.5"
IPW CBC-10-5 carbon block — $8.99
Replaces genuine OEM: Olympia OROS-PRECB
4
RO membrane
75 GPD thin-film composite
TW-1812-75 — $36.99
Replaces genuine OEM: Olympia OROS-ROM80 (Olympia lists 50 and 80 GPD)
5
Inline post-carbon polish
10" × 2" coconut GAC inline · ¼" quick-connect
IL-10W-C-EZ — inline GAC, ¼" QC — $8.12
Replaces genuine OEM: Olympia OROS-POST
When to replace
🪣 Sediment & carbon: every 6–12 months🥤 Inline post-filter: every 2,500 gallons (about yearly)💧 RO membrane: every 2–3 years
✓ Fits Olympia 5-stage RO systems — standard 10" cartridges, 1812 membrane & ¼" quick-connect inline. Not sure which membrane you have? 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.
Olympia OROS-75 filter FAQ
What filters does the Olympia OROS-75 use?
The same five filters as other Olympia 5-stage systems: a 5 micron sediment filter (OROS-PRESF), two 5 micron coconut carbon blocks (OROS-PRECB), an 1812 membrane and a coconut carbon inline post-filter (OROS-POST) with ¼" quick-connects.
Is there an Olympia OROS-75 membrane?
Olympia's current manuals list only the OROS-ROM50 (50 GPD) and OROS-ROM80 (80 GPD). If your label says 75 GPD, our 75 GPD membrane is the same 1812 size and fits. Owners of an 80 GPD unit can use the 75 GPD membrane with a small drop in output.
How often should I change the filters?
Olympia says to change stages 1 to 3 every 6 to 12 months and the post-filter every 2,500 gallons. The membrane lasts 2 to 3 years.
Does the inline post-filter push in or screw in?
Olympia systems use push-in ¼" quick-connect fittings on the post-filter, held with blue lock clips. That is why we link the ¼" quick-connect inline and set.
All replacement filters by system · Olympia OROS-50 · Universal 5-stage RO · APEC RO-45
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.
