iSpring WGB21B
#2 in CartridgeFull review
A low cost first whole-house filter for city water with chlorine taste. Expect to change filters several times a year.
Amazon $155.99$155.99
3.4/5
A low cost starter system for chlorinated city water in a small home.
- 15 gpmFlow
Check price at Amazon$106.98
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- The cheapest system here to buy
- Coconut carbon filter takes out chlorine taste and smell
- Standard 10 x 4.5 in housings accept common filters
Cons
- No gallon rating, so running cost cannot be compared
- Small filters need changing about twice a year or more
- Tested to NSF/ANSI 42, not certified
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 | WD-WHF21-PG |
|---|---|
| Filtration | |
| Stages | 2 |
| Tested to (not certified) | NSF/ANSI 42 |
| Chloramine | No |
| PFAS | No |
| Build | |
| Flow | 15 gpm |
| Ports | 1 in |
| UV stage | No |
| Warranty | 1 year |
Alternatives in this build
Waterdrop WHF3T-PG
#3 in CartridgeFull review
A lower priced three stage big blue system for city water. Running cost is hard to judge without a gallon rating.
Amazon $269.99$269.99
3M Aqua-Pure AP903
#4 in CartridgeFull review
A certified, low mess choice for city water with chlorine, for owners who would rather pay more per cartridge than handle filters.
Amazon $422.99$422.99
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