6 Best Alternatives to the iSpring WGB32B Heavy Metal Whole (2026)

How alternatives compare to iSpring

iSpring WHO32B-KS Freestanding Whole House Filter

The iSpring WHO32B-KS is a freestanding unit, so you do not need to mount it on a wall. It is taller and heavier than the WGB32B-KS, weighing 71.9 pounds versus 52 pounds. The housing is slightly wider at 9.1 inches. This model keeps the same 15 GPM flow rate and heavy metal reduction focus. You should choose this if you want easy access for maintenance without climbing ladders or dealing with wall brackets. The freestanding design simplifies placement in a garage or utility room. It retains minerals just like the original system. This option suits large households that prioritize convenience and high flow over compact wall-mounted storage.

Express Water 3-Stage Whole House Filter

The Express Water FLTWH2045CKS1 is a replacement filter set, not a complete system. It fits standard 20-inch by 4.5-inch housings. You likely already own the blue housings from the iSpring system. This set provides heavy metal reduction similar to the original. It lacks the complete assembly, so you must supply the brackets and housing yourself. It is a budget-friendly choice if your existing housings are still in good condition. The filtration capacity matches the 100,000-gallon standard. You save money by reusing hardware. This is ideal for homeowners who just need to refresh their filters without buying a new entire unit. It does not include the flow control or mounting hardware.

iSpring 3-Stage Heavy Metal Whole House Filter

The iSpring F3WGB32BKS is a white-colored filter set for a 3-stage system. It shares the same 15 GPM flow rate and heavy metal reduction capabilities as the blue WGB32B-KS. The cartridges are the same 20-inch size. This model is lighter at 14 pounds. It is a direct replacement if you prefer a white aesthetic for your utility space. The filtration performance remains identical. You still get the 100,000-gallon capacity. This option is best if you want to match white appliances or decor. It does not include the housing or brackets. You must install the cartridges into compatible housings. It retains healthy minerals while removing chlorine and heavy metals. This is a straightforward swap for those who like the original specs but want a different color.

iSpring WGB21B-PB Lead Reduction System

The iSpring WGB21B-PB is a 2-stage system focused on lead reduction. It has a lower height at 18 inches and is lighter at 25 pounds. The flow rate remains 15 GPM. This system is more compact than the 3-stage WGB32B-KS. You should pick this if you have limited vertical space. It targets lead specifically, whereas the original handles a broader range of heavy metals. The design is simpler with fewer stages. It retains minerals like the original. This model is suitable for households with specific lead concerns. It does not offer the third stage of filtration found in the WGB32B-KS. The compact size makes it easier to fit in tight areas. It is a lighter, smaller alternative for targeted lead removal.

iSpring PFAS & Heavy Metals System

The iSpring WGB32B-PFKS targets PFAS and heavy metals. It is slightly lighter at 41.7 pounds and has a similar footprint to the original. This model adds PFAS reduction to the heavy metal filtration. You should choose this if PFAS is a primary concern in your water supply. It retains minerals just like the WGB32B-KS. The flow rate and capacity are comparable. This system is for buyers who need broader contaminant coverage. It keeps the DIY installation ease. The color coding helps identify the specific filter type. It is a practical upgrade for homes with PFAS issues. The dimensions are very close to the original. This option provides peace of mind for specific chemical contaminants while maintaining high flow.

Express Water Heavy Metal 3-Stage System

The Express Water V-WH300SCKS is a 3-stage system with visible monitoring tools. It is taller at 29.3 inches and heavier than the original. This model includes a sight glass for monitoring filter status. You should pick this if you want visual confirmation of filter condition. It offers heavy metal reduction similar to the iSpring system. The Deluxe Series construction suggests durability. It lacks the specific NSF certification details listed for the iSpring model. The flow rate is not explicitly stated here. This system is for homeowners who value visible maintenance indicators. It is a robust alternative for whole-house filtration. The larger size requires more installation space. It provides comprehensive filtration with added monitoring features.

Quick picks

Our 7 picks

1 Best overall

iSpring WGB32B Heavy Metal Whole House Filter

Best for: Whole-home heavy metal and chlorine removal

Flow Rate

Up to 15 GPM

Inlet/Outlet Size

1" NPT

Filter Micron Rating

5 micron

Contaminants Reduced

Lead, chlorine, mercury, sediments

Filter Life

Up to 12 months or 150K gallons

Housing Size

20" x 4.5"

View on Amazon: iSpring WGB32B Heavy Metal Whole House Filter Affiliate link

The iSpring WGB32B-KS is a three-stage whole house water filter designed to remove heavy metals, chlorine, and sediment. It features a 15 GPM flow rate and 1-inch NPT connections for standard home plumbing. The system uses 20-inch by 4.5-inch cartridges that handle up to 100,000 gallons before replacement. It retains healthy minerals rather than reducing total dissolved solids. This unit suits households prioritizing contaminant removal over mineral alteration.

Pros

• 15 GPM high flow rate
• Removes lead, mercury, and hydrogen sulfide
• 100,000 gallon filter capacity
• NSF/ANSI certified stages
• 5 micron sediment pre-filter

Cons

• Does not reduce Total Dissolved Solids
• Bulky 52-pound build requires floor space
• No digital flow meter or indicator

Good fit if

• You need high flow for multiple fixtures
• You want to remove heavy metals and chlorine
• You prefer retaining healthy minerals in water

Skip if

• You require TDS reduction for drinking water
• You have limited space for a 52-pound unit
• You need a compact under-sink system

Verdict: iSpring WGB32B-KS Heavy Metals Whole House Filter offers robust contaminant removal with a high flow rate for whole-home use. It fits families seeking heavy metal reduction without altering mineral content.

2 Also great

iSpring WHO32B-KS Freestanding Whole House Filter

Best for: High-flow whole house filtration without wall mounting

Flow Rate

up to 15 GPM

Contaminants Reduced

Chlorine, sediment, lead, mercury, VOCs

Housing Size

20" x 4.5"

Installation Type

Whole House

Features

Chlorine Reduction, Heavy Metal Reduction, Sediment Filter

Color

Blue

View on Amazon: iSpring WHO32B-KS Freestanding Whole House Filter Affiliate link

The iSpring WHO32B-KS is a freestanding whole house water filter system designed for heavy metal, chlorine, and sediment reduction. It uses industry-standard 20" x 4.5" jumbo cartridges to handle up to 15 GPM flow. The unit features a horizontal housing with drain valves for easy maintenance. It retains healthy minerals and requires no wall mounting, making it suitable for garages or utility rooms.

Pros

• High flow rate of 15 GPM for strong water pressure
• Freestanding metal frame eliminates the need for wall mounting
• Horizontal housing design with built-in drain valves simplifies filter changes
• Uses universal 20" x 4.5" filters for easy replacement
• Retains healthy minerals for balanced water quality

Cons

• Large physical footprint at 25.2 inches long and 71.9 pounds
• No wall-mounting option limits placement flexibility in tight spaces
• Does not remove TDS, requiring a separate RO system for full purification

Good fit if

• You need high flow rates for multiple simultaneous water uses
• You prefer floor-standing units to avoid wall drilling
• You want to use standard, widely available replacement filters

Skip if

• You require a compact unit for very tight spaces
• You need total TDS removal for drinking water
• You prefer wall-mounted systems to save floor space

Verdict: iSpring WHO32B-KS Freestanding Whole House Filter suits homeowners who need high flow and easy maintenance without wall mounting. It is a practical solution for reducing heavy metals and chlorine in large households.

3 Best budget

Express Water 3-Stage Whole House Filter

Best for: Heavy metal reduction in existing 20-inch systems

Filtration Stages

3

Filter Micron Rating

5 micron

Contaminants Reduced

Heavy metals, lead, iron, chromium

Filter Life

Up to 100,000 gallons

Housing Size

4.5 x 20 Inch

Installation Type

Whole House

View on Amazon: Express Water 3-Stage Whole House Filter Affiliate link

This replacement filter set targets heavy metals using KDF technology with catalytic carbon, copper, and zinc granules. It fits standard 4.5-inch by 20-inch housings. The system handles up to 100,000 gallons before needing replacement. It reduces iron, lead, nickel, and chromium while maintaining water pressure. You get whole-house coverage without reducing total dissolved solids.

Pros

• KDF filter reduces heavy metals like lead and nickel
• 100,000-gallon filter life
• Fits standard 4.5-inch by 20-inch housings
• Maintains water pressure during filtration

Cons

• Does not reduce total dissolved solids
• Requires compatible 20-inch housing
• Heavy metal reduction depends on incoming water quality

Good fit if

• You need to reduce heavy metals in whole-house water
• You already own 4.5-inch by 20-inch filter housings
• You want high-capacity filtration without changing TDS

Skip if

• You need to reduce total dissolved solids
• You use standard 10-inch filter housings
• You require reverse osmosis purification

Verdict: Express Water 3-Stage Heavy Metal Filter is a practical replacement for homes needing heavy metal reduction. It suits buyers with existing 20-inch housings who prioritize capacity over TDS removal.

4 Best white

iSpring 3-Stage Heavy Metal Whole House Filter

Best for: Removing heavy metals and chlorine at high flow

Filtration Stages

3

Flow Rate

Up to 15 GPM

Filter Micron Rating

5 micron

Contaminants Reduced

Chlorine, lead, mercury, heavy metals

Filter Life

100,000 gallons

Housing Size

20" x 4.5"

View on Amazon: iSpring 3-Stage Heavy Metal Whole House Filter Affiliate link

This iSpring unit is a 3-stage whole house filter designed to reduce chlorine, heavy metals, and other harmful chemicals. It features a 5-micron sediment stage and a coconut shell carbon block. The system supports a flow rate of up to 15 GPM and each filter has a 100,000-gallon capacity. It fits standard 20" x 4.5" housings. You should choose this if you need broad contaminant removal without reducing total dissolved solids.

Pros

• Removes chlorine, lead, mercury, and hydrogen sulfide
• High flow rate of up to 15 GPM
• 100,000-gallon filter capacity per cartridge
• Fits standard 20" x 4.5" housings

Cons

• Does not reduce Total Dissolved Solids (TDS)
• Requires separate housing purchase
• Heavy at 14 pounds

Good fit if

• You want to remove heavy metals and chlorine
• You need a high flow rate for the whole house
• You prefer keeping healthy minerals in your water

Skip if

• You need to reduce Total Dissolved Solids
• You only have space for a single stage
• You want a complete system with housings included

Verdict: iSpring 3-Stage 20" Whole House Filter provides high-capacity contaminant reduction for households prioritizing heavy metal removal. It suits you if you already own compatible housings and need a 15 GPM flow rate without TDS reduction.

5 Best 2-stage

iSpring WGB21B-PB Lead Reduction System

Best for: lead reduction and high flow needs

Filtration Stages

2

Flow Rate

Up to 15 GPM

Inlet/Outlet Size

1" NPT

Contaminants Reduced

Lead, chloramine, chlorine, sediment

Filter Life

50,000 gallons

Housing Size

10" x 4.5"

View on Amazon: iSpring WGB21B-PB Lead Reduction System Affiliate link

This 2-stage whole house system targets lead and chlorine reduction. It features a 15 GPM flow rate and 1-inch NPT connections for easy splicing into main lines. The second stage filter handles up to 50,000 gallons of lead-loaded water, dropping levels from 100 ppb to 15 ppb. It keeps healthy minerals in your water rather than reducing TDS. You get a compact build with lifetime tech support.

Pros

• Reduces lead from 100 ppb to 15 ppb
• 15 GPM flow rate for whole house coverage
• 50,000 gallon filter capacity
• NSF/ANSI certified carbon block filter

Cons

• Only 2 filtration stages
• Does not reduce Total Dissolved Solids
• No remote monitoring or app control

Good fit if

• You need specific lead reduction in your main water line
• You want a high flow rate for household use
• You prefer keeping healthy minerals in your water

Skip if

• You require 3-stage filtration for broader contaminant removal
• You want to reduce Total Dissolved Solids
• You need smart home integration for filter monitoring

Verdict: iSpring WGB21B-PB 2-Stage Heavy Metal System offers targeted lead removal with a strong 15 GPM flow rate. It suits households prioritizing heavy metal reduction over comprehensive TDS removal.

6 Best premium

iSpring PFAS & Heavy Metals System

Best for: PFAS and heavy metal reduction with mineral retention

Inlet/Outlet Size

1" NPT

Filter Micron Rating

5 microns

Contaminants Reduced

PFAS, lead, mercury, chlorine

Filter Life

Up to 100,000 gallons or 12 months

Water Source Type

Municipal and well water

Housing Size

20" x 4.5"

View on Amazon: iSpring PFAS & Heavy Metals System Affiliate link

This iSpring system targets PFAS and heavy metals using specialized media. It includes a 5-micron sediment pre-filter to protect downstream components. The setup treats up to 100,000 gallons or lasts 12 months. It features standard 1-inch NPT ports for DIY installation. The unit retains beneficial minerals rather than reducing total dissolved solids. It suits homes needing broad contaminant reduction.

Pros

• SGS-tested media reduces up to 99% of PFAS
• KDF and GAC media reduce lead, mercury, and chlorine
• 5-micron sediment filter captures rust and sand
• 100,000-gallon capacity or 12-month filter life
• Standard 1-inch NPT ports for easy DIY setup

Cons

• Does not reduce total dissolved solids (TDS)
• Requires pairing with a reverse osmosis system for TDS reduction
• 1-year limited warranty is shorter than typical industry standards

Good fit if

• You need specific protection against PFAS in your water
• You want to retain beneficial minerals in your water
• You prefer a DIY installation with standard plumbing connections

Skip if

• You require total dissolved solids reduction in your whole house system
• You need a warranty longer than one year
• You want a system that does not require additional RO pairing for mineral retention

Verdict: iSpring PFAS Heavy Metals Whole House Filter delivers targeted PFAS and heavy metal reduction for homes prioritizing specific contaminant removal. It fits buyers who value mineral retention and standard DIY installation over comprehensive TDS reduction.

7 Best nsf certified

Express Water Heavy Metal 3-Stage System

Best for: Whole house heavy metal reduction

Filtration Stages

3

Inlet/Outlet Size

1"

Contaminants Reduced

heavy metals, dirt, silt

Filter Life

6-12 months, 100K gallons

Certification

NSF Certified

Installation Type

Whole House

View on Amazon: Express Water Heavy Metal 3-Stage System Affiliate link

This whole house system uses three filtration stages to target heavy metals via KDF redox media. It features a deluxe stainless steel frame with pressure gauges and release buttons for easy monitoring. The filters last up to 100,000 gallons. It connects with 1-inch inlet and outlet ports. You should choose this if you need broad whole house protection against sediment and heavy metals.

Pros

• Three-stage filtration process
• KDF media for heavy metal reduction
• Includes pressure gauges for monitoring
• 100,000-gallon filter life
• Stainless steel bracket and frame

Cons

• Large footprint at 29.3 inches tall
• Requires 1-inch connections
• Filters need replacement every 6-12 months

Good fit if

• You want heavy metal reduction throughout your home
• You prefer a free-standing system with a steel frame
• You need pressure gauges to track filter status

Skip if

• You only have 3/4-inch plumbing connections
• You need a compact under-sink unit
• You want to replace filters less than once a year

Verdict: Express Water 3-Stage Heavy Metal System delivers comprehensive whole house filtration with visible monitoring tools. It suits homeowners who prioritize heavy metal reduction and durable construction over compact size.

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