iSpring WGB31B-PFKDS Whole House PFAS Water Filter

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Product guide

iSpring WGB31B-PFKDS Whole House PFAS Water Filter

The iSpring WGB31B-PFKDS is a three-stage whole-house filter system listing PFAS reduction, chemical and heavy-metal reduction, and scale inhibition. Its stated capacity is up to 80,000 gallons or 12 months, depending on water quality and use. The manufacturer says it does not remove calcium or magnesium, so it is not a water softener.

At a glance

Three filter stages are described for PFAS, chemical and heavy-metal reduction, plus scale inhibition.
The manufacturer says the first-stage filter is SGS-tested to reduce up to 99% of PFAS, including PFOA and PFOS.
The listing states up to 80,000 gallons or 12 months of service, depending on water quality and usage.
Listed 1-inch female NPT inlet and outlet ports and standard 10-inch by 4.5-inch filter housings.
Manufacturer says the system retains minerals and does not reduce total dissolved solids.

Price

$469.98Save 16%

Reference price: ~~$559.99~~

Price checked: Nov 14, 2026

View offer

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Pros and cons

Pros

Whole-house installation is intended to treat water supplied throughout the home rather than at one tap.
The three stages address different listed concerns, including PFAS, chlorine and heavy metals, and mineral scale buildup.
The stated capacity and service life provide a clear replacement-planning reference, subject to water quality and usage.

Cons

It does not soften water or remove calcium and magnesium, so water hardness remains unchanged.
It does not reduce total dissolved solids, according to the manufacturer.

Technical specifications

10 specifications

Identity
Brand	iSpring
Model	WGB31B-PFKDS

Filtration and operation
Purification method	Carbon Block, GAC+KDF, Polyphosphate
Materials listed	Activated Carbon, KDF, Polyphosphate
Power configuration	Water Pressure
Installation type	Whole House
Capacity	80000 gallons
Filter life cycle	12 months

Dimensions and installation
Dimensions listed	10.8"L x 18"W x 24.5"H
Weight listed	31 pounds

What to know before buying

Capacity and service life are manufacturer-listed maximums and depend on water quality and usage. The manufacturer says to install indoors in a well-ventilated area away from direct sunlight and heat. Its stated operating limits are 25–80 psi and 40–100 ºF.

Listing details to confirm

The listing combines claims of scale inhibition and prevention with an explicit statement that calcium and magnesium are not removed. Treat this as scale-buildup protection, not water softening. The listed dimensions of 10.8"L x 18"W x 24.5"H differ from a feature claim describing a 10" x 4.5" compact filter. Confirm the footprint and installation clearances for the selected system.

What’s in the box

Included

System
Filters
Manual
Installation kit

Who is it for?

A good fit for

Households seeking a whole-house system with manufacturer-claimed PFAS reduction alongside chlorine and heavy-metal reduction.
Buyers who want scale-buildup protection but do not need water softening or total dissolved solids reduction.
Homes where the listed 1-inch female NPT connections and stated installation dimensions suit the plumbing space.

Less suited to

Anyone seeking reduced water hardness or a system that removes calcium and magnesium.
Anyone seeking total dissolved solids removal.

iSpring WGB31B-PFKDS Whole House PFAS Water Filter · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 68 ratings

5 stars74%74%
4 stars18%18%
3 stars4%4%
2 stars0%0%
1 star4%4%

Customer feedback is positive about perceived water-quality improvements, reduced chemical smells, cleaner taste, and shower experience. One report describes noticeable changes within two days. These are customer-reported impressions, not proof of the listing’s PFAS or contaminant-reduction claims. For buyers considering whole-house treatment, the feedback is relevant to everyday water use, while the manufacturer’s stated capacity and limits remain important selection factors.

Positive themes

Customers report improved water quality, reduced odors, cleaner-tasting water, and a better shower experience.

Frequently asked questions

Does the WGB31B-PFKDS soften water?

No. The manufacturer says it does not remove calcium or magnesium, so water hardness remains unchanged. It is described as inhibiting scale buildup, not softening water.

How long do the filters last?

The listing states up to 80,000 gallons or 12 months, depending on water quality and usage.

What does the manufacturer claim about PFAS reduction?

The listing says the first-stage filter is SGS-tested to reduce up to 99% of PFAS, including PFOA and PFOS. This is a manufacturer claim, not an independently verified result here.

What should I check before installation?

Confirm the actual system footprint because the listing provides conflicting size descriptions. Also verify plumbing fit with the listed 1-inch female NPT ports and ensure the location meets the stated pressure, temperature, and indoor-placement guidance.