Replacement filter · ro water filter
Express Water RO5DX 5-Stage RO: replacement cartridge
Here is the exact cartridge the Express Water RO5DX 5-Stage RO takes, its current price, how often to replace it, and what that works out to - ~$23/yr (about 1,100 gal) on our engine's math, not a guess.
What it costs to keep running
- Annual filter cost
- $23/yr
- Cost per gallon
- $0.021
This is the same figure our scoring engine uses on the Express Water RO5DX 5-Stage RO scorecard, computed from each cartridge's price and rated gallons across every stage. Prices last checked 2026-06-01.
The cartridge it takes
RO5DX one-year replacement combo
$91.99- Replace
- rated 4,380 gallons
- Price checked
- 2026-06-01
Generic and third-party cartridges fit this model, so you are not locked into the brand part. The reorder link searches the exact part string, which surfaces both the OEM cartridge and compatible equivalents.
Reorder links are Amazon affiliate links: FilterScored earns a commission at no extra cost to you. Affiliate relationships never influence a score, which is computed by an engine from published specs and verified certifications.
Prices and part numbers are the ones we last verified from the manufacturer or a retailer listing on the dates shown; check the current price at the link before reordering. The annual figure is our engine's computation from that data, not a statement of what you will pay.
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