# iSpring WGB21B-PFKS Whole-House PFAS & Heavy-Metals Filter

Heavy-Metals: The iSpring WGB21B-PFKS is a two-stage whole-house water filter listing SGS-tested media claimed to reduce up to 99% of PFAS. Its stated targets also include chlorine, sediment and heavy metals, with a listed capacity of 50,000 gallons or 12 months.

- [Original product page](https://best-deals.pro/product/ispring-wgb21b-pfks-whole-house-water-filter)
- [View offer](https://best-deals.pro/visit/ispring-wgb21b-pfks-whole-house-water-filter)
- Market: US
- Language: en-US
- Currency: USD
- Brand: iSpring
- Model: WGB21B-PFKS
- Category: Tools & Garden > Electrical & Plumbing
- Price: 290.03 USD
- Previous price: 359.99 USD
- Discount: 19%
- Price checked: 2026-11-14T09:41:25.464Z
- Rating: 4.6 / 5
- Reviews: 3899

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Two-stage design lists KDF and granular activated carbon for its first stage, with PFAS-targeting media in stage two.
- The listing claims up to 99% PFAS reduction, including PFOA and PFOS, and describes the claim as SGS-tested.
- First-stage targets include chlorine, chloramine, lead, mercury, hydrogen sulfide, sediment and particles as small as 5 microns.
- Listed filter life is up to 50,000 gallons or 12 months. Actual replacement timing may depend on water conditions and use.

## Pros

- Targets several contaminant categories in a whole-house system, including PFAS, chlorine and sediment.
- The listed 50,000-gallon capacity and 12-month filter life provide clear replacement planning figures.
- The manufacturer lists a wall-mount installation and standard 1-inch NPT ports.

## Specifications

### Identity
- Brand: iSpring
- Model: WGB21B-PFKS
### Filtration and operation
- Filtration stages: Two-stage
- Purification media: Carbon Block, Granular Activated Carbon
- Power configuration: Water Pressure
- Listed capacity: 50000 gallons
- Filter life: 12 months
- Operating pressure range: 1.72-4.48 bar
- Upper temperature rating: 100 °F
- Maximum supported water TDS level: 300
### Dimensions and installation
- Dimensions listed: 16"L x 8"W x 18"H
- Weight listed: 21 pounds
- Installation type: Wall Mount
### Materials and protection
- Material listed: Plastic
- Special features listed: Multi Stage Filtration, Portable, Heavy Duty, Leak-Proof

## Before you buy

- Listing details are inconsistent about the media: the specifications name carbon block and granular activated carbon, while the feature description assigns stage one KDF and GAC and stage two PFAS media. The title gives 1-inch inlet/outlet, while the installation text specifies standard 1-inch NPT ports. The claimed PFAS reduction is described as SGS-tested, but no test report details are provided here. Confirm media configuration and plumbing fit for the selected listing. The stated maximum TDS level does not mean the system reduces TDS.

## In the box

- System (Included)
- Filters (Included)
- Manual (Included)
- Installation kit (Included)

## A good fit for

- Households seeking whole-house filtration aimed at PFAS alongside sediment, chlorine and certain metals.
- Buyers with plumbing space for a listed 16"L x 8"W x 18"H wall-mounted system.
- People comfortable scheduling cartridge replacement based on a stated 50,000-gallon or 12-month limit.

## Less suited to

- Anyone whose primary goal is reducing total dissolved solids. The listing says this system does not reduce TDS.
- Buyers who need independently documented performance details for specific contaminants before choosing a filtration system.

## Customer feedback

Customer feedback highlights perceived improvements in chlorine and sediment filtration, water taste and general quality, with some describing sturdy construction. Experiences with odor reduction and durability are mixed: some report long service, while others describe a short lifespan or an unpleasant bleach-like taste. These are customer-reported experiences, not confirmation of the listing’s PFAS performance. For a whole-house filter with a stated 50,000-gallon or 12-month life, the variation makes installation quality, water conditions and replacement planning relevant considerations.
- Positive themes: Customers report better-tasting water and noticeable improvement in perceived water quality.
- Positive themes: Customers describe the unit as heavy-duty and report effective chlorine and sediment filtration.
- Mixed feedback: Reports about longevity vary, from years of use to a reported lifespan of about a month.
- Mixed feedback: Odor results are mixed, including reports of odor reduction and of a bleach-like taste.

## Frequently asked questions

### Does the WGB21B-PFKS reduce PFAS?
The listing claims its stage-two media is SGS-tested to reduce up to 99% of PFAS, including PFOA and PFOS. Test details are not supplied here, so consult the listing or manufacturer documentation for the specific test conditions.
### Does this system reduce TDS?
No. The supplied product information says the system does not reduce TDS. It suggests pairing with a reverse-osmosis system if lowering TDS is needed.
### How often do the filters need replacing?
The listing gives a maximum life of 50,000 gallons or 12 months. Treat these as stated limits, not a guarantee that every household will reach both.
### What should I check before installation?
Confirm the connection type and fit against your plumbing. The title states 1-inch inlet and outlet, and installation information specifies 1-inch NPT ports. The listed operating pressure range is 1.72-4.48 bar.

## Alternative options

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- [iSpring WGB31BCM Whole House Water Filter System with Clear Filter Housing \| Reduces Iron, Manganese, Chlorine, Sediments, Taste, Odor, 10”x 4.5" Filters, 1" Inlet/Outlet, 3-Stage](https://best-deals.pro/visit/ispring-wgb31bcm-whole-house-water-filter)
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## Add-ons

- [iSpring UVF55FS Whole House UV Water Filter, 1" MNPT Inlet/Outlet, 12 GPM \| 55W, Whole House Ultraviolet Water Purifier Filte](https://best-deals.pro/visit/ispring-wgb21b-pfks-whole-house-water-filter)
- [iSpring HB18B Whole House Water Filter Housing, 10" x 4.5" Universal Housing for Whole Home Water Filtration w/ 1" NPT Ports](https://best-deals.pro/visit/ispring-hb18b-whole-house-filter-housing)

## Images

![iSpring WGB21B-PFKS Whole-House PFAS & Heavy-Metals Filter — 1](https://best-deals.pro/i/YR9EolDAiTg-qfmUTe84DhAvCBS-yd6Fc1tGLQ068tJPqfaMBk9Daud0IpSdcVhmAEv_l2Z8SbOCqELpuJ7_hl0SBUypBReVbhrpB7eHFuSWTdevarfl.jpg)

![iSpring WGB21B-PFKS Whole-House PFAS & Heavy-Metals Filter — 2](https://best-deals.pro/i/5A9esWK6fAatKiuxGSGR2L2HSI_PtAKRqM2BqQwlsp3xCwJY6KZBflA17z7Va6t8UtpYwhl0RZ4ZcFmYe-AF8AwgqYJOJjlj7UKo1cxkhORaQxCzzhRZ.jpg)

![iSpring WGB21B-PFKS Whole-House PFAS & Heavy-Metals Filter — 3](https://best-deals.pro/i/Q6twI-3bPHt7JENHkuKrEzBtbkrBMGzqnvHWoPBtSVLbtE6bp2nM-IvWnLzVodvjuAL87vzlHJtbwRpG1Q9NoNrCaAk-OB9CSP1A6ETduny2NdJYgQlD.jpg)

![iSpring WGB21B-PFKS Whole-House PFAS & Heavy-Metals Filter — 4](https://best-deals.pro/i/RVbqTfZ1uv6hSib6ujG-v7quaZyCgCojyGEWd8KJ3voEg1ir5VD1tNeiR_QOm1Ze421w8rsDKeMlHhmDpgJMrnpStMS5iN-qTY4517MBQgjpA5gjszhG.jpg)

![iSpring WGB21B-PFKS Whole-House PFAS & Heavy-Metals Filter — 5](https://best-deals.pro/i/WH_039zvcbLJ4Ao49t3HDxAVQU1V2pQ7fQlefOEl3LsiAiM8Jij8phOmWDcts0gZA4JKojrS8JBazFa1fprZuRnCUAEu2n-bS9R9RYYLYXDyHK6zxN-B.jpg)

![iSpring WGB21B-PFKS Whole-House PFAS & Heavy-Metals Filter — 6](https://best-deals.pro/i/ahRWqcazL6beKXDvBnTKzA3dx5jvhuHV05DPvxWoh0L_SpYCfyZe2_PNxmhJ8vTxT2DPPsV1dIGysnnLcFBHqCrcq_EDeyxQ_EHo-0EC-DiBwGUeXwlu.jpg)

![iSpring WGB21B-PFKS Whole-House PFAS & Heavy-Metals Filter — 7](https://best-deals.pro/i/oosuuEEpeJVtEDIZi0l4J_pOWjj-jJGV3O0_g-VI_YH4-FKY2W_pxPvgumQNGkNb5ZSv-C6clLNbJRK9JwJn2f38KCJw3puS7JCgB8feiEMPkmY9EOV4.jpg)