Under sink filter

An under sink filter is a dedicated water purification system installed directly beneath the kitchen counter to provide clean, filtered water on demand. These systems connect to the cold water supply line, directing water through one or more filtration stages before it reaches a dedicated faucet. They are chosen by households seeking to improve the taste, odor, and quality of their tap water by removing common contaminants like chlorine, sediment, and heavy metals. Unlike pitcher filters, under sink models offer a continuous supply of treated water without the need for manual refilling. They are designed for permanent installation, making them a practical solution for long-term water quality management in residential kitchens. By utilizing advanced filtration media, these units ensure that water used for drinking and cooking meets higher purity standards.

Use cases of under sink filters

Under sink filters are primarily used in residential settings to enhance the quality of water used for daily activities. Common applications include:

• Providing high-quality drinking water directly from a dedicated tap.
• Improving the taste and clarity of water used for cooking, coffee, and tea.
• Reducing the presence of chlorine and chemical byproducts in tap water.
• Filtering out sediment, rust, and particulate matter from aging plumbing systems.

Types of under sink filters

There are several types of under sink filtration systems available, each utilizing different technologies to address specific water quality concerns:

• Carbon block filters: Effective at removing chlorine, volatile organic compounds, and improving taste.
• Reverse osmosis systems: Multi-stage systems that remove a wide range of contaminants, including dissolved solids and minerals.
• Ultrafiltration systems: Use hollow fiber membranes to remove bacteria and fine particles while retaining essential minerals.
• Multi-stage sediment and chemical filters: Combine various media to target both physical debris and chemical impurities.

Key features to consider

When evaluating under sink filters, consider the following technical specifications:

• Filtration capacity: The volume of water the system can treat before a filter change is required.
• Micron rating: Indicates the size of particles the filter can capture; lower ratings provide finer filtration.
• Flow rate: The speed at which water is dispensed, measured in liters per minute.
• Installation requirements: Compatibility with existing plumbing and the need for a separate faucet.
• Certification: Look for industry-standard certifications that verify the removal of specific contaminants.

How to choose an under sink filter

Selecting the right system depends on your specific water quality and household needs. Start by identifying the primary contaminants in your local water supply through a water test. Determine the available space under your sink, as reverse osmosis systems with storage tanks require more room than compact carbon filters. Consider the maintenance schedule, as some systems require more frequent filter replacements than others. Finally, assess your daily water consumption to ensure the chosen system's flow rate and capacity meet your requirements without causing pressure drops.

Which water filters are the most popular and affordable in 2026?

The full list of popular models at affordable prices is available on this page. In 2026, the following models show high demand and an excellent price-to-quality ratio:

• USTM PP5M PLUS 10-inch Polypropylene Yarn Water Filter Cartridge 5 Micron for 3.49€
• USTM PP20M PLUS 10-inch Polypropylene Yarn Water Filter Cartridge 20 Micron for 3.49€
• Filter cartridge Aquaphor B15 (203053) — universal jug cartridge, lifespan 170 L, Aqualen, activated carbon, silver ions for 4.99€
• Water filter cartridge Aquaphor MAXFOR+ Mg B078N — replacement cartridge, magnesium-enriching, 200 L life, fits Brita Maxtra oval fit for 5.49€
• Water filter cartridge Aquaphor CITYF replacement, 2 pcs, 150 L capacity per cartridge for 5.49€

Why is it worth buying water filters at AiO.lv?

At the AiO.lv online store, you can place an order at a great price with delivery across Latvia — to Riga, Daugavpils, Liepaja, Jurmala, Ventspils, and other cities, as well as throughout Europe. We offer products from leading manufacturers: Electrolux, Philips, Siemens, Samsung, BRAUN, Catlink, DeLonghi, Elica, LG, OEM, Saeco, Tefal, Bosch, Karcher, BLAUPUNKT, Gorenje, HANSA, KRUPS, BRITA, LAICA. When you shop with us, you get:

• official warranty and guaranteed quality;
• convenient payment options (including installment and credit);
• fast and reliable delivery across Latvia and to any EU country.

FAQ

Where can you find a water filters with cheap prices?

You can buy cheaper at the AiO.lv online store. We offer competitive prices and regular discounts, so you always have the chance to find a great deal.

What is the delivery time for water filters?

If you place your order today, delivery will take between 1 and 5 business days depending on the chosen method.

How long is the warranty period for water filters?

Our store provides an official manufacturer’s warranty ranging from 12 to 36 months, depending on the model and brand. If needed, you can always contact our customer service department or the manufacturer’s authorized service center for support.

Are water filters purchasable with leasing?

Yes, if the selected product costs more than €50. You can learn more about installment purchase options and the terms of application on the Payment page.

Can water filters be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and throughout Europe. All product prices are shown with VAT included. In certain cases, a 0% VAT rate may apply — for example, when purchasing from other EU countries with a valid VAT number. We issue an invoice immediately after the order is placed, support BIS electronic invoices, and automatically generate all required accounting documents. To complete a purchase for a company, simply select the company profile during checkout.