Waterdrop X12 Reverse Osmosis System review
By Daryna Klochko · Published · Specs checked Oct 13, 2026 · 
Scores 9.5/10, tied for 8th of the 20 RO systems we track. At $1,299 it is the most expensive of the 20 RO systems, against a category median of $459.99. Its cartridge cost of about $175 a year is below the $205-a-year median of the 19 RO systems with a stated cartridge cost. Its 2-year warranty is longer than the 1-year category median.
You need a certified health claim: its listing covers TDS only, unlike 12 of the 20 RO systems
- Price
- $1,299
- Certified for
- TDS
- Flow
- 0.83 gpm (brand)
- Cartridge life
- 1,100 gal claimed
- Cost per year
- $175
- Warranty
- 2 years
Certification
Listed by IAPMO under NSF/ANSI 58 for TDS, checked Oct 13, 2026. Waterdrop also claims 6 more substances that are not in the listing. Search the IAPMO listings
- TDS
Waterdrop also claims Chlorine, Lead, PFOA/PFOS, Microplastics, 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 13, 2026. What a listing means and what it doesn't
Specs and sources
Checked Oct 13, 2026 · source under each valueFiltration
Cartridges and install
Buying
Warranty, returns and shipping
Warranty: 2 years. Returns: 30 days. Shipping: not stated by the brand. Source: waterdropfilter.com, checked Oct 13, 2026.
Source: waterdropfilter.com, checked Oct 13, 2026.
Compared with similar RO systems
All 20 RO systems →| Model | Price | Certified for | Cost per year | Warranty | Score | Where to buy |
|---|---|---|---|---|---|---|
| Pentair FreshPoint GRO-575 5-Stage Reverse Osmosis | $669.29 | Lead · Cysts +14 | $238 | 1 year | 9.25/10 | Check price → |
| Waterdrop G3P800 Reverse Osmosis System | $999 | Lead · PFAS +2 | $160 | 1 year | 9.75/10 | Check price → |
| Coway All-In-One Under Sink RO (P-160AL) | $1,099 | Lead · Cysts +5 | $433 | 1 year | 8.75/10 | See specs → |
| Coway Under Sink RO (P-09CL) | $1,199 | Lead · Cysts +4 | $372 | 1 year | 8.75/10 | See specs → |
| Waterdrop X12 Reverse Osmosis SystemTHIS MODEL | $1,299 | TDS | $175 | 2 years | 9.5/10 | Check price → |