RO vs UV Water Purifiers: Which is Best in Kenya?
13, Jul 2025
Get clear answers to the top 10 most common questions about water purifiers. Learn how they work, which one to choose, maintenance tips, and more.
Clean drinking water is one of the most important essentials for a healthy life. With rising concerns about water pollution, heavy metals, and chemicals in tap water, water purifiers have become a common household need. But with so many types available RO, UV, UF, carbon filters, and many more people feel confused about how they work, which one to choose, and how to maintain them.
To clear things up, we’ve put together answers to the top 10 most frequently asked questions about water purifiers. Whether you’re a first-time buyer or already using one, these answers will help you make smarter decisions about your drinking water.
Water purifiers work by removing contaminants such as dirt, chlorine, heavy metals, and harmful microorganisms from your water. Different technologies target different impurities. For example, Reverse Osmosis (RO) removes dissolved salts and heavy metals, UV purifiers kill bacteria and viruses, while carbon filters remove chlorine and improve taste and odor. Many modern purifiers combine these methods for complete protection.
The best water purifier depends on your water source:
Most water purifier filters should be replaced every 6–12 months, depending on the type of purifier and water quality. For example, RO membranes usually last about 12 months, while UV lamps last about 9-12 months. Always follow the manufacturer’s instructions, but also watch for signs like unusual taste, smell, or reduced water flow.
Yes, RO water is safe because it removes harmful substances such as heavy metals, pesticides, and dissolved salts.
Yes. Even treated municipal water can pick up contaminants from old pipes, chlorine by products, or bacteria along the distribution line. A purifier ensures an extra layer of protection before the water reaches your glass.
Yes. Most purifiers, especially RO systems, improve taste by removing chlorine, chemicals, and salts. Some add minerals back into the water for a naturally fresh taste.
Common signs include: Change in taste or odor of water, Reduced water flow or pressure,
Purifier making unusual sounds, Filter change indicator light (in advanced models)
Regular servicing and timely filter changes keep your purifier working efficiently.
Some purifiers, like gravity-based filters or countertop pitchers, are easy to set up. But advanced systems like RO or UV purifiers require professional installation to ensure proper water pressure, drainage, and electrical connections. DIY installation of these systems may damage the unit or void the warranty.
Boiling water kills most bacteria and viruses but does not remove chemical contaminants like pesticides, heavy metals, or fluoride. Purifiers especially RO or multi-stage systems go further by eliminating both biological and chemical impurities, making them more reliable for everyday use.
Bottled water may seem convenient, but it isn’t always safer. Studies have shown that bottled water can contain micro plastics and chemicals from plastic bottles. It’s also far more expensive in the long run and harmful to the environment due to plastic waste. A home purifier is a safer, eco-friendlier, and cost-effective choice.
By answering these top 10 common questions, you now have the knowledge to make an informed choice for your family’s health. Clean water isn’t just about quenching thirst it’s about long-term wellness.
