Reverse osmosis system

A reverse osmosis system is a water purification technology that uses a semi-permeable membrane to remove ions, molecules, and larger particles from drinking water. These systems are widely chosen by homeowners and businesses seeking to improve water quality by effectively reducing contaminants such as lead, chlorine, fluoride, and dissolved salts. By applying pressure to overcome osmotic pressure, the system forces water through the membrane, leaving impurities behind to be flushed away. They are typically installed under the kitchen sink or as part of a whole-house filtration setup. Choosing a reverse osmosis system is a practical solution for those who prioritize consistent water purity and taste in their daily consumption. These units are designed for long-term use, requiring periodic filter replacements to maintain optimal performance.

Use cases of reverse osmosis systems

Reverse osmosis systems are utilized in various environments to ensure access to high-quality water:

• Residential kitchens for daily drinking and cooking water.
• Offices and workplaces to provide staff with clean hydration.
• Aquariums where precise water chemistry is required for sensitive aquatic life.
• Coffee shops and restaurants to improve the flavor profile of beverages.
• Areas with hard water to prevent scale buildup in appliances.

Types of reverse osmosis systems

There are several configurations available to suit different installation needs:

• Under-sink systems: The most common residential type, hidden away for convenience.
• Countertop systems: Portable units that connect directly to the faucet, ideal for renters.
• Whole-house systems: Large-scale units that treat water at the point of entry for all household taps.
• Systems with remineralization: Models that add beneficial minerals back into the water after filtration.

Key features to consider

When evaluating a system, consider the following technical aspects:

• Filtration stages: The number of filters determines the depth of purification.
• Membrane capacity: Measured in gallons per day (GPD), indicating how much water the system can process.
• Tank size: Determines the volume of stored purified water available for immediate use.
• Booster pumps: Necessary in homes with low water pressure to ensure efficient operation.
• Smart indicators: Features that alert users when it is time to change filters.

How to choose a reverse osmosis system

Selecting the right system involves assessing your specific water quality and household requirements. Start by testing your tap water to identify the specific contaminants present. Consider the available space under your sink or in your utility area to ensure the unit fits properly. Evaluate your daily water consumption to determine the necessary membrane capacity and storage tank size. Finally, check the maintenance requirements, specifically the frequency and cost of replacement filters, to ensure the system remains sustainable for your budget.

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€
• 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 MF+ 212200 B026N — replacement cartridge for jugs, 200 L life 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.