Express Water RO5DX 5-Stage Reverse Osmosis System review
By Daryna Klochko · Published · Specs checked Oct 15, 2026 · 
Scores 9.75/10, tied for 1st of the 20 RO systems we track. At $189.99 it costs less than half the category median of $459.99. Its cartridge cost of about $81 a year is less than half the $205-a-year median of the 19 RO systems with a stated cartridge cost. Buyers on Home Depot rate it 4.7/5 across 459 ratings.
A lower budget: $189.99, in the cheapest quarter of the 20 RO systems
You need a certified health claim: its listing covers TDS only, unlike 12 of the 20 RO systems
- Price
- $189.99
- Certified for
- TDS
- Flow
- Not stated
- Cartridge life
- 6-month cartridge
- Cost per year
- $81
- Warranty
- 1 year
Certification
Listed by NSF under NSF/ANSI 58 for TDS, checked Oct 15, 2026. Express Water also claims 4 more substances that are not in the listing. Search the NSF listings
- TDS
Express Water also claims Chlorine, Lead, Arsenic, Fluoride: brand claims, not in a certifier listing.
The contaminants or other substances removed or reduced by this water treatment device are not necessarily in your water. Listing checked on Oct 15, 2026. What a listing means and what it doesn't
Specs and sources
Checked Oct 15, 2026 · source under each valueFiltration
Cartridges and install
Buying
Warranty, returns and shipping
Warranty: 1 year. Returns: 30 days. Shipping: not stated by the brand. Source: Express Water data sheet, checked Oct 15, 2026.
Source: Express Water data sheet, checked Oct 15, 2026.
Compared with similar RO systems
All 20 RO systems →| Model | Price | Certified for | Cost per year | Warranty | Score | Where to buy |
|---|---|---|---|---|---|---|
| Pentair OMNIFilter RO2050 4-Stage Reverse Osmosis | $162.23 | Lead · Cysts +10 | $78 | 1 year | 9.75/10 | Check price → |
| Express Water RO5DX 5-Stage Reverse Osmosis SystemTHIS MODEL | $189.99 | TDS | $81 | 1 year | 9.75/10 | Check price → |
| APEC Water RO-90 Ultimate 5-Stage Reverse Osmosis | $264.99 | Lead · Arsenic +9 | $73 | 1 year (limited) | 9.5/10 | Check price → |
| Brio G10-U ROSL500 Tankless Reverse Osmosis System | $299.99 | Brand claims only | $290 | 1 year (limited) | 9/10 | Check price → |
| Brondell Capella RC250 Reverse Osmosis | $329.99 | Lead · Cysts +18 | $205 | 1 year limited | 9.75/10 | Check price → |
What owners say
Checked Oct 15, 20264.7/5 from 459 ratings on Home Depot. In our score this is 2 of 2 points. How we score
Store ratings change over time; the date shows when we checked.