A frame mounted three stage system for city water where lead from old pipes is the worry. Its heavy metal claims aren’t certified.
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Every Express Water Deluxe 3-Stage model we rank, smallest first. Ratings compare each against its own build.
| Model | Running cost | Rating | Price |
|---|---|---|---|
| Express Water Ultimate Protection WH300SCKP | $1.78 per 1,000 gal | 2.4/5 | $443.14 |
| Express Water Heavy Metal WH300SCKS (this one) | $1.99 per 1,000 gal | 2.4/5 | $499.99 |
| Express Water Anti-Scale WH300SCPS | $1.84 per 1,000 gal | 2.4/5 | $503.12 |
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its build. How we rank explains each one.
| Model number | WH300SCKS |
|---|---|
| Filtration | |
| Capacity | 100,000 gallons |
| Replacement filters or media | $198.88 |
| Running cost | $1.99 per 1,000 gal |
| Stages | 3 |
| Chloramine | No |
| PFAS | No |
| Build | |
| Flow | 15 gpm |
| Ports | 1 in |
| UV stage | No |
| Warranty | 1 year |
The best value of Express Water’s three stage systems, for hard city water with old pipes. Its claims aren’t certified.
Amazon $443.14For hard city water where scale on the water heater is the main worry but a softener is too much. It doesn’t soften.
Amazon $503.12A cartridge system built for chloramine treated city water, with a longer warranty than most at this price.
Amazon $375.48Compare the Express Water Heavy Metal WH300SCKS with any other whole-house water filter →
More from Express Water: every Express Water product ranked.
