Whole-house or point-of-entry (POE) filters are the ultimate in-home water treatment. They give you complete confidence that all of the water entering your home, whether it’s for the shower, laundry machine, or kitchen tap, meets the safety and aesthetic standards you need.

As for what those standards are—it really all depends on your water source. Drawing your supply from a private well? Then you’ll probably want to consider a multi-stage filter that includes mechanisms for removing bacteria and protozoa. Concerns about water purity? Then a reverse osmosis POE system might be for you. Perhaps you’re on city water, and are simply interested in premium taste and water softness across your whole home? 

Whatever you’re looking for from a POE filter, these systems provide the cutting edge in water treatment technology. Here are the best whole house water filters available to buy today.

APEC Water Systems ROES-PH75 Essence Series Top Tier Alkaline Mineral pH+ 75 GPD 6-Stage Certified Ultra Safe Reverse Osmosis Drinking Water Filter System
  • Supreme quality - designed, engineered and assembled in USA to guarantee water safety & your health.
  • US made cartridge uses food-grade calcium from trusted source for safe, proven water pH enhancement. Enjoy ultra-pure drinking water with added calcium minerals for improved ALKALINITY and great taste.
  • WQA certified system. Premium long lasting filters used to treat tap/well water. Provide unlimited clean drinking water.
  • America's No.1 rated water filter brand with 20 years of success guaranteeing trouble free, noise-free system for long lasting, dependable, pure drinking water.
  • 2 year extended manufacturer warranty with registration. System comes with all parts and industry's best instructions and videos for an easy DIY experience.
APEC Water Systems RO-90 Ultimate Series Top Tier Supreme Certified High Output 90 GPD Ultra Safe Reverse Osmosis Drinking Water Filter System, Chrome Faucet
  • Enjoy unlimited ultra-fresh, clean, great tasting water right at home. Save money, time and hassle of buying costly, bottled water
  • Designed, engineered and assembled in USA, RO-90 is the most durable system in the industry to guarantee water safety & your health
  • Tested and certified by WQA to remove up to 99% of contaminants including arsenic, chlorine, lead, fluoride, heavy metals, virus and 1000+ contaminants
  • Large super capacity filters deliver 2X contaminant removing capacity for fewer filter change outs compared to smaller all-in-one filters that clog up quickly
  • Comes with 100% lead-free designer faucet, plus JG Food grade tubing to provide safe, contamination-free pure water. The original, top-notch JG Quick Connect fittings for easy and secure leak-seal
iSpring RCC7AK 6-Stage Superb Taste High Capacity Under Sink Reverse Osmosis Drinking Water Filter System with Alkaline Remineralization-Natural pH, White
  • 6-Stage Alkaline Remineralization Layered Filtration: Exclusively designed to restore the natural alkalinity and mineral balance of water; this reliable and ultra-safe Reverse Osmosis (RO) water filtration system converts your water into clean, pure and healthy drinking water by removing up to 99% of over 1, 000 harmful contaminants like chlorine, fluoride, lead (removes up to 98%), arsenic, asbestos, calcium, sodium and more.
  • BENEFITS: The iSpring RCC7AK water softener includes an additional sixth stage - an Alkaline Remineralization filter which restores healthy minerals and produces a balanced alkalinity, which gives your water a more natural taste than regular 5 stage RO water filter; the RO membrane removes not only harmful pollutants but also a few helpful minerals. As a result, a standard 5 stage RO system produces slightly acidic water with a pH of 7. 0 or below
  • FEATURES: Beautiful European-Style kitchen faucet. Transparent 1st stage housing for easy visual inspection. Three extra long life pre-filters to remove large contaminants and protect RO membrane. Ultra fine (RO) filter to remove contaminants down to 0. 0001 microns; fine GAC filter to provide final polishing to the purified water and (AK) filter to finally restore just the right proportion of healthy minerals and a natural alkaline balance. The end result is great-tasting bottled-water quality
  • EASY DO IT YOURSELF INSTALLATION: The water purifier is designed for do-it-yourself installation and all necessary parts for installation are included, backed by clear, well-organized written instructions, instructional videos, and access to iSpring unparalleled technical support. The entire alkaline water filter fits nicely under a standard kitchen sink. For leak-free installation, simply push tubing ½ inch deep into quick-fitting connectors and lock; no threading pipes needed
  • 100% SATISFIED CUSTOMERS: RCC7AK from America’s favorite brand of under sink water filter is the No. 1 rated reverse osmosis systems in the USA backed by iSpring extended manufacturer upon registration at 123filter DOT com / and lifetime personalized support line 678-261-7611 from Alpharetta, GA, combined with premium quality components, this water filter is to deliver endless bottled quality drinking water right in your home for many years to come, eliminating plastic bottles

Remember

  • Not all whole-house filters are built equally. What contaminants a point-of-entry system can and can’t remove depends on the filter mechanisms which make up each stage of the filtration process. In general, expect to choose from any combination of sediment filters, reverse osmosis membranes, ultraviolet purifiers, carbon filters, and water softeners. Include all five, and there aren’t many water sources you couldn’t turn into a drinkable liquid!

  • Add the costs of installation, labor, and maintenance to the base price of a whole house filter, and prices can quickly escalate. For this reason, it’s important to be selective in what you’re looking for from a POR system, in terms of filtering power and price-point.

  • While many whole-house filters are primarily designed to target water taste, there are other, more wallet-friendly ways to improve the flavor and smell of your tap supply. Pitcher, countertop, and under-sink models will all filter for taste at a fraction of the cost. So, if you are interested in a whole-house system simply to improve taste, be sure to know your options.

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iSpring WGB21B 2-Stage Whole House Water Filtration System with 10" x 4.5" Big Blue Sediment CTO(Chlorine, Taste, and Odor) Filter, 1" Inlet/Outlet
  • [Two-Stage Effective Filtration] 1st-Stage premium 5-micron polypropylene sediment filter (FP15B) captures dirt, sand, silt, dust, rust, and scale particles and extends the life of CTO carbon block filter. Using high quality coconut shell carbon and highly compact fabrication tech, 2nd-stage CTO filter(FC15B) knocks out cloudiness as well as bad tastes and odors, removes over 90% of chlorine, and is highly effective on organic compounds like herbicides and industrial solvents.
  • [Superb Filtration Capacity] 10"x4.5" replaceable whole house water filters can provide up to a full year of clean water(up to 50,000 gallons) for a family of four. 1-inch inlet and outlet ports allow fast water flow with less pressure loss. Fine PP sediment filter and premium quality CTO filter not only bring clean and fresh water to every faucet in your house, but also help prolong the lives of your water-using appliances and protect plumbing from sediment and scale buildup.
  • [Easy Installation and Filter Change] The system comes pre-assembled onto the mounting bracket for a streamlined, DIY installation. Filter wrench included to make routine filter changes easy and quick. A pressure release valve allows for the release of built-up pressure when changing filters. Refer to our manual and/or YouTube videos to Install this point-of-entry (POE) filtration system at the main water supply to get clean and healthy water for the entire family.
  • [Top-Notch Customer Service] Backed by a 30-day money-back guarantee and extended manufacturer warranty upon warranty registration at iSpring. Lifetime tech support(678-261-7611) from Atlanta, GA USA.
  • [TDS Note] Unlike an RO system, this system will NOT reduce Total Dissolved Solids (TDS), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems such as RCC7 series and/or tankless RO system RO500.
GE GXWH40L High Flow Whole Home Filtration System
  • Heavy-duty filtration system: Clear sump allows for easy viewing of filter
  • Filters water at the main supply: Install system in basement and/or out of sight. Compatible Pipe Connections-Horizontal only
  • Premium filtration: Certified to reduce sediment, scale, dirt and rust in your water, appliances and plumbing fixtures
  • Easy installation: Includes 1" plumbing connection, pressure relief valve, bypass option, mounting bracket and remote filter reminder light for simple installation and filter change
  • Three-month life: For best filtration results, filter: FXHTC or FXHSC (not included) should be replaced every three months

What is a whole-house filter—how do they differ from kitchen filters?

Unlike a water filter found inside your kitchen, whole-house filters are designed to treat your supply before it ever hits your tap. Generally, these systems are installed at the earliest possible point in your plumbing, where the main line enters your home, or after the pressure tank if you source your water from a well.

As said above, a whole-house filter may make use of a range of filtering mechanisms. But they also might use the same filtering process as most kitchen filters—that is, activated charcoal that adsorbs organic compounds like chlorine and Volatile Organic Chemicals (VOCs).

But even if a POE filter is filtering water in the same way as a standard Brita filter, the POE cartridge is going to be a lot bigger, meaning that water spends far more time in contact with the filtering element. Plus, that carbon may also be structured in a highly dense carbon block and treated with materials such as zinc, which allows whole-house carbon filters to expand their filtering credentials.

Why invest in a whole-house filter?

Even in highly developed countries, not everybody can trust in their local water supply. The EPA estimates that a little over 90% of Americans have access to regularly monitored clean drinking water from public sources, with over fifteen million people on private wells. Amongst private well users, a significant proportion are responsible (willingly or not)  for ensuring their own water safety.

Plus, as the lead pollution issues at Flint, Michigan, and other high profile cases have shown, there’s always a risk that public water treatment infrastructure may fail. For many people, this isn’t a chance they’re willing to take—and with the technology available to produce safe drinking water at home—more and more of us are making the decision to invest in a POE system.

For some homeowners, the need to install a whole-house filter is less of a choice than a necessity. For those private well users, getting the majority of their supply from groundwater significantly ups the probability of contamination, as pollutants seep into the earth from landfills, fuel runoff, farming, industry, and other urban causes.

Water softening

For many people, installing a whole-house water filter provides a suitable opportunity to add a water softener into their plumbing. Hard water (water with high magnesium and calcium levels) can cause a number of niggling issues in daily life, such as refusing to create soap suds, leaving mineral stains on kitchenware, and making hair and skin feel coarse.

Worse, calcium deposits from hard water can build up in pipes and appliances over time, reducing efficieny—although mineral-rich water may be slightly better for your health than soft water, as McGill University discusses in this article.

Most water softeners function by attracting and replacing the magnesium and calcium in water with sodium chloride (salt). The system will wash the active component in saltwater before running the tap supply through, using a process called ion exchange to soften it. Here’s our blog on What exactly is ‘hard’ and ‘soft’ water? for more info.

Purification vs filtration

It’s worth pointing out that not every component of a whole-house system actually filters your water. While ‘filter’ is a reasonable catch-all term, components using processes such as ultraviolet radiation are actually purifying water rather than filtering out contaminants.

UV systems are intended for use on water containing microorganisms—protozoa, bacteria, and viruses not safe for consumption. By blasting them with UV rays, these products deactivate pathogens, disrupting their cellular structure, but they don’t remove them from the water supply. This is why you’ll almost always see a UV purifier paired with some other form of filtration in a whole-house system.