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Water filters · point of entry

Whole House Water Filters

A whole house filter treats water where the main line enters the house, so every tap, shower and appliance gets it. What an exact unit is certified to reduce, how much flow it passes without starving the shower, and how often the media needs changing differ model to model.

Treats water where the main line enters, so every tap and shower gets it. Flow at an acceptable pressure drop is the number that matters.

How whole house filters workHow it worksTreats every outlet · sized to flowEvery outlet
What it does

Sized to flow, not to a glass.

Water passes through a sediment stage and a carbon bed where the main line enters, at the full flow of the house. Chlorine, taste, odor and sediment are reduced at every outlet; dissolved metals mostly pass through. The number that matters is flow at an acceptable pressure drop. A unit that reduces chlorine but halves your shower pressure is the wrong unit.Sediment and carbon stages at the point of entry, at the full flow of the house. Chlorine, taste and sediment are reduced at every outlet; dissolved metals mostly pass through.

  • Who it suitsHomes on chlorinated city water that want less of it in showers, laundry and every tapCity-water homes that want less chlorine in showers and laundry
  • What it needsSpace where the main line enters, a bypass loop, and a backwash drain for larger bedsSpace at the main line, a bypass loop, a drain for big beds
  • What it won’t doReduce lead, arsenic or nitrate. That’s RO at the kitchen tap.Reduce lead, arsenic or nitrate. That’s RO at the tap.
  • Running costA sediment cartridge and carbon media, each on the maker’s schedule
WaterDecoder’s picks · from systems in our database that qualify for this job · not a ranking

Our picks

Not curated yet

Our editors haven’t curated whole house picks yet.

There are no picks for this set yet. Every system in our database is in the catalogue below, and Finder can match one to your home.

Finder

Get personalized recommendations.

Picks are editorial and the table is a list. Neither knows your flow, your pressure or your plumbing. Tell Finder what you want in your own words. It asks only what it needs, then matches exact configurations.

  • Same engine as the full Finder, in a compact frame
  • Nothing is asked twice when you continue
  • Whole house is context here, never an answer about your home
The catalogue

All whole house systems, side by side

No published products

No published products in this category yet.

We don’t have any whole house systems in our database yet. When one is added with its evidence on file, it appears here with its basis and the facts that decide a purchase.

Finder

Not sure what you need?

Finder asks how you know, what a test found and what your home needs, then tells you plainly what it can match.

Ask Finder
Before you buy

Four numbers decide a whole house filter before the brand does.

Flow
Peakhousehold flow
Peak household flow, with several fixtures running at once. A filter rated below that starves the shower when it matters.Peak household flow. A filter rated below it starves the shower.
Pressure drop
At flowpressure drop
What the filter costs you in pressure at rated flow. A large drop is felt at the shower; carbon blocks drop more than loose beds.What the filter costs in pressure at rated flow. A large drop is felt.
Port size
Matchyour main line
Match your main line. A filter with smaller ports than the line is a bottleneck no media can fix, and large homes need larger ports.Match your main line. Smaller ports than the line make a bottleneck.
Media life
Per makermedia life
Carbon beds last years; the sediment cartridge in front of them is replaced far more often. Replacement cost, not purchase price, is the ownership number.Carbon lasts years; the sediment cartridge in front is replaced more often.
Also decidesCertified targetsChlorine, taste and sediment are the norm (NSF/ANSI 42). Chloramine needs catalytic carbon; lead and PFAS at whole-house scale are rare and expensive.Chlorine, taste and sediment are the norm. Chloramine needs catalytic carbon.Backwash or cartridgeLoose-media tanks backwash to a drain automatically; cartridge housings don’t need a drain but need hands-on changes.Loose beds backwash to a drain; cartridges need hands-on changes.Bypass loopThree valves at install let you service the filter without shutting off the house. Insist on it.Three valves so you can service it without shutting off the house.What it isn’tNot a softener (hardness passes), not RO (dissolved metals pass). Those stack after it.Not a softener, not RO. Those stack after it.
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Whole House Water Filters | WaterDecoder