Water equipment
Best Whole House Water Filters
A whole-house filter installs at your main water line and treats every tap in the home — unlike a pitcher or faucet filter, which only treats the water you actually pour through it. Here's what actually matters when picking one, and how the top-rated systems compare.
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Quick picks
We are still verifying product picks for whole-house filtration, and we only list products after an editor has checked them. Until then, here is how to build a shortlist that fits your home.
- What it removes. Most systems handle sediment and chlorine. Anything beyond that, such as lead or PFAS, needs a stage certified for it.
- Flow rate. Compare the rated gallons per minute with your home's peak use, or pressure drops when several fixtures run.
- Rated capacity. Rated gallons and the change interval decide how often you replace media or cartridges.
- Installation. It goes on the main line, usually with bypass valves. Plan for a plumber and check local plumbing codes.
Full comparison
Our product comparison for whole-house filtration fills in as products are reviewed. These are the criteria we compare on, so you can check any model against them yourself.
| What to compare | What to look for |
|---|---|
| What it removes | Most systems handle sediment and chlorine. Anything beyond that, such as lead or PFAS, needs a stage certified for it. |
| Flow rate | Compare the rated gallons per minute with your home's peak use, or pressure drops when several fixtures run. |
| Rated capacity | Rated gallons and the change interval decide how often you replace media or cartridges. |
| Installation | It goes on the main line, usually with bypass valves. Plan for a plumber and check local plumbing codes. |
| Your water report | Check your utility's annual water quality report or run a lab test first, so you buy for the contaminants you actually have. |
How whole-house filtration works
Most whole-house systems use one or more filtration stages — typically a sediment pre-filter to catch grit and rust, followed by a carbon stage to reduce chlorine, chloramine, and many taste-and-odor compounds. Some add a specialty cartridge for iron, tannins, or specific contaminants found in well water.
Because they treat water at the point it enters the home, whole-house systems protect appliances (water heaters, washing machines) from sediment and scale buildup in addition to improving tap water at every fixture.
What to check before buying
- Flow rate (GPM): should comfortably exceed your home's peak simultaneous demand, or you'll notice a pressure drop.
- Certification: look for NSF/ANSI 42 (aesthetic effects like chlorine/taste) or NSF/ANSI 53 (health effects, e.g. lead) testing against the specific contaminants you care about.
- Filter change interval and cost: a cheaper unit with frequent, expensive cartridge changes can cost more over 2-3 years than a pricier system with a long-life cartridge.
- Installation: most require cutting into the main line; factor in a plumber unless you're comfortable with basic plumbing.
Frequently asked questions
Do whole-house filters remove fluoride?
Standard sediment/carbon whole-house filters generally do not remove fluoride — that typically requires reverse osmosis or a specialty ion-exchange media, and is usually addressed at the point of use rather than whole-house.
How often do I need to change the filter?
It depends entirely on the cartridge and your household's water usage and quality — ranges from every 3 months for basic sediment filters to annually for some high-capacity carbon systems. Check the manufacturer's rated capacity in gallons, not just a generic time estimate.
Whole-house filter vs. water softener — do I need both?
They solve different problems. A filter targets chlorine, sediment, and contaminants; a softener targets hardness minerals (calcium/magnesium) that cause scale. Many households on hard well water run both in sequence.
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