Water Systems
Whole-House Water Systems
A whole-house system treats water at the point it enters your home, protecting every fixture and appliance rather than just one tap. Well water and city water often call for different combinations of these stages.
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What's in this category
Multi-stage sediment + carbon systems installed on the main line — the general-purpose entry point.
Configured around what private wells commonly carry — sediment, iron, tannins, and bacteria are the usual targets.
The first stage in nearly every whole-house setup, catching grit, rust, and particulates before finer media.
Reduces chlorine, chloramine, and many taste-and-odor compounds — the workhorse stage for municipal water.
Uses ultraviolet light to neutralize bacteria and other microorganisms — common on private wells, doesn't remove sediment or minerals on its own.
Targets dissolved and oxidized iron that stains fixtures and laundry — a frequent well-water issue in certain regions.
Addresses the 'rotten egg' smell from hydrogen sulfide gas, common in some well sources.
Compare install model, service approach, and product range between the major treatment companies.
Top picks in this category
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.
Frequently asked questions
Do I need UV purification if I already have a carbon filter?
They solve different problems — carbon filtration doesn't reliably neutralize bacteria or other microorganisms, which is what UV targets. Private wells at risk of microbial contamination often run both in sequence.
Whole-house filter vs. water softener — do I need both?
Yes, often. A filter targets chlorine, sediment, and contaminants; a softener targets hardness minerals that cause scale. See our Water Softeners guide for that half of the picture.
How do I know if I need iron or sulfur-specific filtration?
Staining on fixtures/laundry usually points to iron; a rotten-egg smell points to sulfur (hydrogen sulfide). A well-water test kit confirms which — see our Water Testing guide before buying a specialty stage.
