iSpring WF150K
#3 in TankFull review
A backwashing carbon tank for owners who want a long life system with a long warranty and have a drain nearby.
Amazon $1,673.70$1,673.70
2.9/5
A cheaper backwashing catalytic carbon tank for a large city home with chloramine. Its claims are not backed by testing or a warranty term.
- $0.85 per 1,000 galRunning cost
- 1,000,000 gallonsCapacity
- 12 gpmFlow
Check price at Amazon$849.99
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Catalytic carbon and KDF media for chloramine treated water
- Backwashing valve keeps the bed clean for up to 10 years
- Rated 12 gpm through a 1 in bypass, enough for a large house
Cons
- No published warranty term
- No certification or stated test standard
- Needs a drain and an outlet for the backwash valve
How it scores
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.
Specifications
| Model number | FK-CAT |
|---|---|
| Filtration | |
| Capacity | 1,000,000 gallons |
| Replacement filters or media | $849.99 |
| Running cost | $0.85 per 1,000 gal |
| Stages | 1 |
| Chloramine | Yes |
| PFAS | No |
| Build | |
| Flow | 12 gpm |
| Ports | 1 in |
| Backwashing | Yes |
| UV stage | No |
Alternatives in this build
Aquasana Rhino Max Flow with UV
#4 in TankFull review
For a large house that needs high flow and wants UV added. Most city homes can skip the UV and pay less.
Amazon $2,246.99$2,246.99
iSpring WF1054
#6 in TankFull review
For city homes with chloramine that want a tank with no drain or power, but its short warranty is a weak point at this price.
Amazon $1,417.99$1,417.99
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