Reverse Osmosis Water Filters in Hong Kong

Reverse osmosis water filters are the gold standard for home water purity. By using advanced membrane technology, these systems effectively eliminate dissolved contaminants and impurities that standard filters cannot remove. Waterlinks offers a curated selection of premium reverse osmosis solutions, ranging from space-saving countertop units like AquaTru to high-capacity under-sink systems. Ensure your family enjoys safe, refreshing water by exploring our range of RO systems to find the perfect solution for your home.

Under-Sink RO · Countertop RO · All Drinking Water Filters · Replacement Filters

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What is a reverse osmosis water filter and how does it work?

A reverse osmosis (RO) system is a highly efficient water treatment technology. It works by using pressure to force tap water through a semi-permeable membrane, which effectively leaves behind dissolved solids (TDS) and other microscopic impurities, allowing only pure water molecules to pass through.

What does reverse osmosis remove from your water?

  • Heavy metals (lead, copper), chlorine, and by-products: Removes the metallic taste and harsh chemicals often found in ageing municipal pipes.
  • Fluoride, nitrates, microplastics: Effectively filters out the microscopic pollutants that common filters cannot catch.
  • Bacteria & parasites (e.g., cryptosporidium): Provides an added layer of safety by physically blocking harmful microorganisms.

Is reverse osmosis water good for you?


Yes, reverse osmosis water is exceptionally pure and free from many contaminants often found in city water pipes. While the process is highly thorough, many users prefer to restore essential minerals to their water. Many of our systems offer remineralisation options, which not only provide potential health benefits but also enhance the crisp, clean taste of your daily drinking water.

What are the disadvantages of reverse osmosis?

  • Produces some wastewater: While some water is used during the filtration process, modern systems are far more efficient than older models, minimising waste.
  • Removes beneficial minerals: Because RO is so effective, it removes minerals along with impurities; however, remineralising models are available to add them back.
  • Needs installation space / a dedicated faucet: Under-sink systems require some cabinet space and the installation of a dedicated faucet.

Countertop vs under-sink RO — which should you choose?

  • Countertop (e.g., AquaTru): These require no plumbing at all, making them the ideal choice for rental flats where drilling is not possible.
  • Under-sink: These are hidden from view, offer higher filtration capacity, and utilise a dedicated faucet for a seamless kitchen look.

Why choose Waterlinks for reverse osmosis systems?

Waterlinks curates premium RO brands, ensuring you receive a system built for performance, along with HK-based support, expert installation guidance, and genuine replacement filters. Explore our RO systems here.

FAQ — Reverse Osmosis Water Filters

Q: Does reverse osmosis remove minerals, and is that a problem?

A: Yes, reverse osmosis technology removes minerals due to its fine filtration. However, this is easily managed; you can choose a remineralised model, and dietary minerals are also easily obtained through your daily food intake.

Q: How often should I replace RO filters and the membrane?

A: Typically, pre-filters and post-filters should be changed every 12 months, while the core reverse osmosis membrane lasts approximately 2 years. See our replacement filters collection to keep your system in top condition.

Q: Do I need a plumber to install an RO system?

A: Countertop models require no plumbing at all. Under-sink systems are a simple install—Waterlinks can provide the guidance you need to set it up correctly.