iSpring · Whole-house
iSpring WGB21B-PF PFAS whole-house: what it removes and what it costs
Model: WGB21B-PF (KDF/GAC stage + FC15B-PF carbon block, 10in x 4.5in; refill F2WGB21BPF)
The iSpring WGB21B-PF PFAS whole-house has no certifier listing for any of the contaminants we track. iSpring also claims PFAS, chlorine and VOCs from lab tests that are not certification. For 2 people drinking and cooking with it, replacement filters cost about $280 a year.
0
certified reductions we track
0.3¢
filters per gallon at rated life
Price checked 2026-10-23. We may earn a commission.
What the iSpring WGB21B-PF PFAS whole-house removes
"Certified" means a certifier (NSF, WQA, IAPMO or CSA) lists this exact product for that reduction claim; the listing is linked. "Brand test only" means iSpring cites a lab report but no certifier lists the claim. See certified vs. tested.
| Contaminant | Status | Evidence |
|---|---|---|
| PFAS | Brand test only | SGS (brand says 'SGS-tested'; report not linked): "PFAS/PFOA/PFOS (up to 99%)" |
| Chlorine | Brand test only | Brand claim: "Chlorine, VOCs, sediment, taste/odor" |
| VOCs | Brand test only | Brand claim: "Chlorine, VOCs, sediment, taste/odor" |
Not verified, either way (no certification or brand claim): Lead, Chloramine, Fluoride, Arsenic, Nitrate, Chromium 6, Mercury, Microplastics, Cysts, TDS, Bacteria and viruses, Iron, Copper, Uranium, 1,4-dioxane.
What it costs to run
Yearly cost = replacements per year × filter price, for each filter it uses; a filter is replaced at its gallon rating or its month limit, whichever comes first. Water use: all indoor water (58.6 gallons per person a day).
| Household | Gallons a year | Filters a year | Total a year | Per gallon |
|---|---|---|---|---|
| 1 person | 21,389 | $280 | $280 | 1.3¢ |
| 2 people | 42,778 | $280 | $280 | 0.7¢ |
| 4 people | 85,556 | $280 | $280 | 0.3¢ |
Replacement filters
| Filter | Rated life (gallons) | Rated life (months) | Price |
|---|---|---|---|
| F2WGB21BPF replacement set | 50,000 Source note | 6 Source note'up to 6 months or 50,000 gallons' ispringfilter.com | $139.99 Source note$139.99, no sale, 2026-10-23 ispringfilter.com |
Specs
- Type
- Whole-house
- Price
- $326
Source note
$325.99 (compare-at same, no sale) seen 2026-10-23. ispringfilter.com
- Installation
- Plumber recommended
- Needs power
- No
Where it ranks
Compare the iSpring WGB21B-PF PFAS whole-house
Updates about the iSpring WGB21B-PF PFAS whole-house
- October 23, 2026 · We checked 96 filters: 44% of reduction claims are brand-tested only
- October 23, 2026 · 15 of 17 whole-house filters we track have no certified health claim
Common questions
What does the iSpring WGB21B-PF PFAS whole-house remove?
The iSpring WGB21B-PF PFAS whole-house has no certifier listing for any of the contaminants we track. iSpring also claims PFAS, chlorine and VOCs from lab tests that are not certification. For 2 people drinking and cooking with it, replacement filters cost about $280 a year.
Does the iSpring WGB21B-PF PFAS whole-house remove PFAS?
iSpring claims PFAS reduction from lab tests by SGS (brand says 'SGS-tested'; report not linked), but there is no certifier listing for it.
How much does the iSpring WGB21B-PF PFAS whole-house cost to run?
About $280 a year for 2 people ($280 for 1, $280 for 4), counting replacement filters, for all indoor water (58.6 gallons per person a day).
Data checked 2026-10-23. 102 filters tracked.