How to choose a water filter


Accumulative filters of ultra-low performance are usually made in the form of a filter-jug.

These models are designed for a small family that uses both tap water and filtered water for cooking, disinfecting them by boiling. Depending on the region of residence and the composition of the local water, and, accordingly, the prevailing pollution, you can choose different internal fillers filter elements. And depending on the size of the family, you can choose models for different volumes of water poured: up to 1 liter, 1-1.5 l, 1.5-2 l, more than 2 l (the volume of the jug and the volume of filtered water differ, usually by 2 times). It is also necessary to take into account the costs of further maintenance of the jug in advance.

The filter resource is the maximum amount of water that the internal adsorbent is still able to purify. Manufacturers always categorically insist on compliance with the declared resource. Mechanical and electronic resource indicators are designed to help with this, which count the time of use of the cartridge filter or, in an advanced version, the actual liter of water being treated.

It is worth noting that the filter cartridges of one manufacturer do not fit the jugs of another with rare exceptions. Often, the model range of pitchers produced is so diverse that it requires the release of different cleaning modules by design, so the user needs to remember not only the name of the manufacturer, but also the indexes of compatible cartridge filters.

Sometimes the problem of replacing different filters can be solved using adapters.

Note: the numerous videos on the Internet from the following unsatisfactory tests of water after the jars are designed to convince them of the futility. However, such a simple filter does not have a task to replace the local water utility or replace boiling.its goal is only to bring the taste, color and smell of water to an acceptable norm, that is, to condition and compensate for pollution that penetrates at the stage of delivery through the water supply system. Removal of toxic compounds or pathogenic microflora is assigned to another type of storage filters-with reverse osmosis.

Flow-through filters

Further complication of water treatment leads to the appearance of such forms as flow filters

The simplest models are made in the form of a nozzle on the tap and in fact do not differ from the cartridge for the jug filter, transferred to the flow mode. So that its resource is not spent on technical water, for example for washing dishes, the nozzle can be easily removed or have a switch to the “no filtration” mode.

A little more complex in design and more resource – table, they have already added an element such as a separate tap for clean water.

Even more diverse in terms of absorption of carcinogenic compounds and, accordingly, more complex in design filters “under the sink”. They are used where the dimensions allow. The simplest ones-single-stage ones-are designed to remove large particles, such as sand, silt, algae, rust, etc.the Filter element can be either disposable from polypropylene or reusable (washed) mesh.

To expand the range of absorbed contaminants, the cartridges themselves in single-stage models can be made up of several different absorbents.

Then the filters evolve in the direction of complexity. Additional steps are added, each of which is designed to filter a specific class of harmful compounds. The more such modules there are, the more selective and accurate the removal of the corresponding impurities will be. Widely produced 2 – 3 – 4 – 5 – 6 – step models.

In such multi-module systems, the first step is the coarse filters that remove impurities that are visible even to the naked eye; the next step filters out pesticides, organic matter, chlorine, pavas; then-microorganisms, heavy metals, salts; another smells, tastes; the last the smallest particles. You cannot change the order of the steps, because if this rule is violated, the fine filters at the entrance will work out their resource much faster and will become unsuitable for further use, also blocking the flow of passing water.

Reverse osmosis systems.

This is a type of multi-stage filters with the addition of a special reverse osmosis membrane that passes through only water molecules. Substances that have a larger size are first cut off, and then merged into the drainage. This type of filter can remove most chemical compounds and microorganisms, including viruses. It should be borne in mind that due to the peculiarities of the membrane, such a system needs to drain into the sewer, where, depending on the input pressure, 2/3-9/10 of all water will go (this is important in the absence of cheap centralized water supply). Reverse osmosis filters are very sensitive to the value of the input pressure and, if it is not enough, an additional electric pump is used to increase it.


In the flow path filters the most appropriate filter elements of different companies are interchangeable between them. The cost of maintenance depends on the number of stages and the resource of each. As with other types of filters, you must carefully monitor the resource of installed cartridges. (Some types of adsorbents after saturation are able to return back the accumulated pollution. Also, filters of any composition have an irresistible property of being a source of reproduction of the most diverse microflora due to the ideal conditions created for its explosive growth).

The process of replacing cartridges can be relatively difficult, especially for “under the sink” filters. To reduce the complexity of replacing filters, there are design solutions that allow you to perform this operation in one click and do not require any experience.

Naturally, such filters will be more expensive and will remain tied to a specific manufacturer. Everything is the same as always: either cheap, but all by yourself, or easy, but expensive.

In all designs, the filter element itself is located in a waterproof housing. It is usually made of plastic. To significantly extend the service life, increase reliability, use on large-diameter pipes or the ability to work with hot water, the housing is made of steel or brass.

Connection to water supply

All filters connected to the water supply are equipped with a full set of necessary plumbing accessories. Crane attachments and table models have adapters for popular types of cranes, which, however, does not exclude difficulties with unskilled installation. Filters “under the sink” are connected by a special splitter to the kitchen mixer. Additional tools are required during installation: keys, gaskets, sealants for threaded connections (fluoroplast, flax, etc.).

Connectors (fittings) for drinking water filters usually have a diameter of 1/2″, and main ones for process water have a diameter of 3/4″. The more water consumers there are, the more productivity the filter must provide and, accordingly, the larger the size (diameter) of the pipe must be.

If it is necessary to change the diameters, adapters are used.

Numerous connections inside the filter are usually made with John Guest collet connectors. This type of connection, developed by the company of the same name, is widely used, thanks to numerous advantages, such as: instant speed of connection and disassembly, ease of installation, reusable, unnecessary tools. You only need to follow the installation instructions exactly.

The temperature of the treated water
Most filters are designed for cleaning cold water up to ~40°C. but special models are also available for hot water up to ~95°C. As a rule, these are main filters that are installed on the riser and clean all incoming hot water to technical quality, which is essential for protecting home plumbing, for getting clear water in the bathroom or shower, as well as for household appliances that use hot water. The housings of these filters are usually metal (steel, brass) or heat-resistant reinforced plastic with metal inserts, in addition they have double gaskets. The filter elements themselves are also different: they are made in the form of a reusable mesh with the possibility of cleaning or a disposable polypropylene cartridge with thermally bonded fibers, which prevents boiling at a high temperature. The cost of hot water filters is higher. Their compatibility is one-sided – for hot, you can put on a cold one, but on the contrary, you can not.

Mobile filters

Bottle filters are slowly but surely entering everyday life. The desire to drink clean water in any circumstances is natural. For some, this is a long trip, for some the lack of an office cooler or distrust of bottled water, some are attracted to the external design, for some it is a requirement of the corporate environment and social environment. Some people find it much easier to find a point of sale of bottled water than to search for untreated for a bottle filter, and some on the contrary, so this type of filter will find its fans.

Any miniaturization has its price. The volume of treated water in these models is an order of magnitude smaller, and the cost of consumables is sometimes an order of magnitude higher.

Office cleaners

Water purifiers and mineral filters are widely used in various organizations and public catering. According to the principle of operation, they are similar to ordinary household filters only in larger dimensions and, accordingly, with greater performance. Often, they not only purify water, but also change its composition: increase mineralization, add dissolved hydrogen, reduce the redox potential, etc. Further complication of purifiers in the form of a heating unit and / or a cooling unit is called purifaers, which replace bottle coolers . Maintenance in the technical part does not differ from any other relevant filters.

Top 5 water filters

Brita Ultra Max Filtering Dispenser, Extra Large 18 Cup

  • SPACE EFFICIENT: The BPA-Free Ultra Max Water Dispenser tank holds 18 cups or 1.13 gallons of water which is great for families. Fits neatly on countertops and refrigerator shelves. Height – 9.67 inches. Width – 13.94 inches. Depth – 5.19 inches. Weight 3 pounds
  • CLEANER AND GREAT TASTING: The Brita standard filter reduces chlorine (taste and odor), copper, mercury, zinc and cadmium impurities found in tap water for cleaner great tasting water. *Substances reduced may not be in all users’ water
  • FILTER CHANGE REMINDER: A helpful sticker indicator on the water dispenser lets you keep track of when you last changed your water filter and when it needs to be replaced. Replace Brita filters every 40 gallons or every 2 months
  • INSTANT POUR: This large, 18 cup filtered water dispenser has a spigot that makes pouring easy. With the flip top lid, refilling is a breeze
  • REDUCE WASTE & SAVE: One Brita water filter can replace 300 standard 16.9 ounce water bottles which saves you money and reduces plastic waste


Brita Stream Replacement Filters, 2 Count

BPA-free Brita Stream Replacement Filters are made with Filter-As-You-Pour technology so you can get filtered water 10X faster compared to the market leading pitcher system. Made with proprietary dual-layer filtration technology and containing activated carbon to reduce chlorine taste and odor., These filters deliver great-tasting water and maintain a healthy level of fluoride, an additive in water that promotes strong teeth (applies to fluoridated municipal tap water). The filters have an easy-hold grip and click button for simple insertion and removal. Change these filters every 40 gallons, about 2 months for the average family, for best performance. The innovative carbon form means no black flecks. One Stream filter can replace 300 standard 16.9 ounce water bottles. Drink cleaner, great-tasting water with Brita.


PUR PPF951K3 Ultimate Lead Reduction Pitcher Replacement Filter

Product Identifiers

  • GTIN
  • MPN
  • UPC
  • eBay Product ID (ePID)

Product Key Features

  • Color
    Blue, Gold, White, White/Blue
  • Type
    Water Filter
  • Material
  • Filtration Method


  • Weight
    1.2 pounds
  • Width
  • Height
  • Length
    7 inches

Additional Product Features

  • Number of Filtrations
  • Model
  • Style


Brita Faucet Water Filter System

ZeroWater Replacement Filters BPA-Free Replacement Water Filters for ZeroWater Pitchers and Dispensers NSF Certified to Reduce Lead and Other Heavy Metals

ZeroWater Replacement Filters 1-Pack BPA-Free Replacement Water Filters for ZeroWater Pitchers and Dispensers NSF Certified to Reduce Lead and Other Heavy Metals

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