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

1 / 7

Product guide

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.

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.

Price

$290.03Save 19%

Reference price: ~~$359.99~~

Price checked: Nov 14, 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

iSpring UVF55FS Whole House UV Water Filter, 1" MNPT Inlet/Outlet, 12 GPM | 55W, Whole House Ultraviolet Water Purifier Filte

$299.90

iSpring HB18B Whole House Water Filter Housing, 10" x 4.5" Universal Housing for Whole Home Water Filtration w/ 1" NPT Ports

$52.99

Pros and cons

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.

Technical specifications

15 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

What to know before buying

Listing details to confirm

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.

What’s in the box

Included

System
Filters
Manual
Installation kit

Who is it for?

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.

iSpring WGB21B-PFKS Whole-House PFAS & Heavy-Metals Filter · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 3,899 ratings

5 stars80%80%
4 stars13%13%
3 stars3%3%
2 stars1%1%
1 star3%3%

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.
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.
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.