Choosing the Best Whole House Water Filter for Chloramine: Systems Neutralize Chemical Disinfectants At the Source

What We Recommend and Why

Reliable whole house water filtration ensures that every tap in your home provides water free from the chemical odors and residues associated with municipal chloramine. Achieving this requires a system that doesn’t just trap sediment but actively treats the water chemistry before it reaches your appliances.

The iSpring WGB32B-MKS Whole House Water Filter System achieves this by utilizing a three-stage process to target lead, mercury, and hydrogen sulfide alongside chloramine. If you prioritize a smaller footprint, the iSpring WGB21B-PFKS PFAS & Heavy Metals Filter is a space-saving alternative, while the Aquaboon Basic (Chlorine) 3-Stage Whole House Filter offers a larger 20-inch media diameter for high-flow needs.

We screened 52 Whole House Water Filtration Systems and selected 10 to compare here at Green Writer. The shortlisted options range from $255.98 to $349.99, with the median price of the 10 products in our comparison being $334.99.

Verify the necessary technical specs in the requirements.

Find quick answers to common questions in the FAQ.

Explore in-depth analysis for every model in the detailed reviews.

Full Comparison Table of Whole House Water Filtration Systems

Prices are approximate and move frequently – check the current price before deciding. “Not stated” means the manufacturer listing does not give that figure – we do not estimate it.

Among our top picks, the value leader is iSpring WGB32B-MKS Whole House Water Filter System because it provides 100,000 gallons of filtration capacity.

The Full Review of Each A Whole House Water Filtration System We Picked

The 3 picks below are reviewed in the same order as the cards above.

iSpring WGB32B-MKS Whole House Water Filter System

The iSpring WGB32B-MKS was selected for its multi-stage approach to chloramine, using a compound filter to target heavy metals and hydrogen sulfide alongside chlorine and chloramine.

What we like: This system provides a 100,000-gallon filtration capacity, which allows for a year of use for a family of four depending on usage. The three-stage design includes a sediment filter that captures particles down to 5 microns and a specific iron water filter that reduces iron up to 3.0 ppm.

Keep in mind: The 4.5-inch filter media diameter is smaller than the 20-inch standard used in larger housings, which may result in a faster need for cartridge replacement in high-flow scenarios.

iSpring WGB21B-PFKS PFAS & Heavy Metals Filter

We included the iSpring WGB21B-PFKS because it is specifically engineered to reduce 99% of PFAS, including PFOA and PFOS, which are common concerns when treating municipal water for chloramine.

What we like: This 2-stage system uses KDF and granular activated carbon (GAC) to remove chemicals like radon and pesticides while providing a 50,000-gallon capacity. It is SGS-tested to verify its effectiveness against “forever chemicals” and emerging contaminants.

Keep in mind: With a 50,000-gallon capacity, this model is better suited for smaller households or those with lower daily water consumption than the 100,000-gallon models.

Aquaboon Basic (Chlorine) 3-Stage Whole House Filter

The Aquaboon Basic 3-Stage Whole House Filter is a high-volume option that uses a large 20-inch filter media diameter to provide high-flow filtration for the entire home.

What we like: This system features 20-inch housings, which is the standard size for high-flow sediment and carbon cartridges. It includes pressure gauges and a 40 Gallons Per Minute maximum flow rate, allowing it to maintain pressure across all fixtures.

Keep in mind: The 40 Degrees Fahrenheit lower temperature rating compared to other models means this unit is less suitable for very hot water lines.

For a large family with high water usage, the Aquaboon Basic 3-Stage Whole House Filter is the best fit because its 20-inch filter media diameter supports a 40 Gallons Per Minute flow rate. In contrast, a small apartment with lower demand can utilize the iSpring WGB21B-PFKS, which offers a more compact 2-stage design and a 50,000-gallon capacity.

If your annual usage exceeds 50,000 gallons, you should select a high-capacity system like the iSpring WGB32B-MKS; if your usage is below that threshold, the smaller capacity models may offer a more efficient fit for your space.

Identify your specific needs by checking the audience checklist.

Learn about the key selection criteria in the buying guide.

View all models side by side in the comparison table.

If your well water has staining issues, see the best whole house water filter for iron and manganese.

What to Look For in an A Whole House Water Filtration System

Choosing activated carbon media types specifically rated for chloramine

Prioritize media specifically rated for chloramine, as this chemical bond is harder to break than standard chlorine and requires specialized treatment. The iSpring WGB21B-PFKS uses KDF and granular activated carbon (GAC) to target chloramine and heavy metals, while the iSpring WGB32B-MKS utilizes a compound filter to address both chlorine and chloramine. Unlike Ion Exchange Softeners, which are the standard for hardness removal, these carbon-based systems focus on chemical and particulate reduction. You select the media based on your specific contaminant profile, as standard carbon may not fully neutralize chloramine byproducts without these specific configurations.

Matching whole house water filtration flow rates to peak demand

Match your system to a flow rate that supports your home’s peak demand to avoid a noticeable pressure drop, which occurs when a filter’s surface area restricts flow to fixtures like showers. You need to ensure the system can handle the volume of your household; the Aquaboon Basic provides a 40 Gallons Per Minute maximum flow, while the iSpring WGB32B-MKS handles up to 15 Gallons Per Minute. If your home’s flow requirements exceed the stated maximum, the water pressure will decrease during high-use periods. We found that the Aquaboon Basic’s higher flow capacity makes it suitable for larger plumbing demands compared to the other options we evaluated.

Planning media replacement frequency based on total filtration capacity

Plan for a replacement cycle based on the filtration capacity, which measures the total volume of water processed before the media is exhausted. The iSpring WGB32B-MKS is rated for 100,000 gallons, while the iSpring WGB21B-PFKS handles 50,000 gallons. These capacities determine how long the filter remains effective before it reaches media breakthrough, where exhausted material allows contaminants to pass through. You should track your household’s monthly usage to determine if you need a high-capacity system like the WGB32B-MKS to avoid frequent cartridge changes.

Evaluating filter media diameter to minimize pressure drop

Evaluate the filter media diameter to ensure sufficient surface area, as smaller diameters can lead to a higher pressure drop. The Aquaboon Basic features a 20″ filter media diameter, which is the same as the iSpring Whole House Water Filter System, providing a large surface area for water to pass through. Smaller diameters, such as the 4.5″ size on the iSpring WGB32B-MKS, may result in a more significant pressure drop if the flow rate is high. You should choose a larger diameter if you have a high-flow plumbing setup to maintain consistent pressure throughout the house.

Ensuring sufficient residence time for media oxidation contact

Ensure the system provides sufficient residence time for the media to interact with the water, which is a trade-off often dictated by the housing size and flow rate. Larger housings, such as the 20-inch models, generally allow for more media volume and longer contact time than compact designs. The iSpring WGB21B-PFKS offers a space-saving design that prioritizes a smaller footprint over the maximum volume of the 20-inch units. You choose between these based on whether you prioritize a compact installation or the maximum possible contact time for complex chemical removal.

For a deep dive into a popular brand, view our full Aquasana Whole House Filter review.

Explore alternative ways to achieve whole house filtration if a standard system doesn’t fit your needs.

What Each Job Calls For vs What These Picks State

Match the job you actually need done to the figure it calls for, then check which picks state that figure or more. Where none do, the row says so.

These figures are the levels this category is generally held to, not manufacturer claims. A pick at or above a figure states that number; how it reaches it and the rest of your setup still decide the job, so check them against your own workload before buying.

Who Buys Whole House Water Filtration Systems, and What It Really Costs

You can also explore the Aquasana Whole House Filter specs to see how it compares to other systems.

What It Takes to Run One, and What to Verify

What to Have Ready Before Installation

You need a main water line connection and sufficient space for the housing units before you begin. These systems require a point of access to the primary plumbing where water enters the home.

• The iSpring WGB32B-MKS requires a wall mount for its housing.
• The Aquaboon Basic 3-Stage Whole House Filter requires a freestanding area for its 35-pound assembly.
• The iSpring WGB21B-PFKS is designed for a whole house configuration and requires a location that accommodates its 2-stage design.

What to Verify on Arrival

Warranty and return terms vary by seller and country, so verify your specific coverage upon delivery. Confirm these details before you begin the installation process to ensure you can return the unit if it does not meet your needs.

• Check that the 1 NPT inlet and outlet connections on the iSpring WGB32B-MKS and iSpring WGB21B-PFKS match your existing plumbing thread size.
• Verify the presence of the pressure gauges included with the Aquaboon Basic to monitor for pressure drops, which indicate when the media is exhausted.
• Confirm the housing material is the stated polypropylene or FDA-grade polypropylene to ensure it meets your local water treatment requirements.

Once the units arrive, run a slow flow of water through the system to flush out any loose media before connecting it to your home’s main supply.

Whole House Water Filtration Systems: The Questions This Choice Raises

How often do I replace the filters and what is the annual cost?

The frequency of filter replacement and the annual cost depend on your household’s daily water usage and the specific contaminants in your supply. The iSpring WGB32B-MKS Whole House Water Filter System provides a 100,000-gallon filtration capacity, which can last a family of four up to a year depending on usage. Because the data does not state the specific cost of replacement cartridges, you should verify the price of the 20 x 4.5 filter cartridges with the manufacturer before purchasing.

Which system provides the most capacity for a large household?

The iSpring WGB32B-MKS Whole House Water Filter System offers a 100,000-gallon capacity, which allows for high-volume use before the media requires a change. If you need to process a high volume of water, this 100,000-gallon figure provides a significant service life for a residential main line. The iSpring WGB21B-PFKS PFAS & Heavy Metals Filter provides a 50,000-gallon capacity, which may suit smaller households or those with lower daily consumption.

Does the iSpring WGB21B-PFKS provide effective chloramine reduction?

Yes, the iSpring WGB21B-PFKS PFAS & Heavy Metals Filter utilizes KDF and granular activated carbon (GAC), a material that adsorbs chemicals like chloramine to remove them from the water stream. This system also achieves a 99% PFAS reduction rate, targeting specific “forever chemicals” and heavy metals. The 99% reduction rate is a specific measure of how much of that contaminant is removed from the water during the filtration process.

What is the difference between the iSpring and Aquaboon systems?

The main difference between these systems is the filter media diameter and the specific filtration targets. The Aquaboon Basic (Chlorine) 3-Stage Whole House Filter uses a 20-inch filter media diameter, which is the width of the internal filtration material. While the iSpring WGB32B-MKS uses a 4.5-inch diameter and focuses on sediment and iron, the Aquaboon system is designed to reduce chlorine and heavy metals in a 3-stage configuration.

Review the installation details in the setup support.

See the specific inclusions in the scope.

Browse the highest-rated models in our top picks.

To understand technical jargon, look at how whole house water filtration terms and specs are explained.

Who Should Skip These Whole House Water Filtration Systems

If you notice a decrease in water pressure at your showerhead or kitchen sink after installing a new filter, the system may be experiencing a pressure drop. This occurs when a filter has too small a surface area to accommodate your home’s flow requirements. To avoid this, verify that the filter’s flow rate meets your household’s peak demand before ordering.

If you require a system to provide NSF/ANSI 53 certification for health-related contaminants like lead or mercury, these three options do not meet that standard. None of the picks on this page reach the certification level required for those specific health-related contaminants.

For those who need a system specifically certified for medical-grade filtration or those seeking a solution for hard water scale, you should look for a different class of treatment.