Why Choose Reverse Osmosis for Water Purification?

Reverse osmosis is an extremely effective method of water purification that removes as much as 99.99% of viruses and 99.99999% of bacteria from water. When you consider the importance of clean drinking water when it comes to health, these figures become even more significant.
A reverse osmosis water filter can reject up to 98% of dissolved contaminants, including harmful substances like lead, chlorine, fluoride, and pesticides. This impressive filtration capability consequently improves the taste of drinking water by eliminating chemicals that affect flavour. Additionally, these systems are environmentally friendly as they reduce the need for bottled water, helping to minimise plastic waste.
Reverse Osmosis systems are becoming increasingly popular in households across the country, not only for their ability to deliver clean, safe drinking water but also because they help families save money in the long run. In addition to this, it is also widely used in a number of sectors and settings from restaurants, hotels and breweries to aquariums, car washes and manufacturing.
At Lubron, we understand the important role that reverse osmosis can play in delivering clean, safe water and the difference it can make to your home or business. In this article, we’ll explore how reverse osmosis works, its benefits and whether it is the right water purification solution for your needs.

The Science Behind Reverse Osmosis Water Filters

The fundamental principle of reverse osmosis (RO) begins with understanding natural osmosis. During osmosis, water molecules naturally move through a semi-permeable membrane from a low-concentration solution to a high-concentration one until equilibrium is reached.
Reverse osmosis, as the name suggests, works by reversing this natural process. By applying pressure to the high-concentration side, water molecules are forced to move in the opposite direction from high to low concentration, effectively filtering out impurities. This pressure must exceed the natural osmotic pressure of the water, which can range from 2-17 bar for fresh and brackish water, and 40-82 bar for seawater.
At the heart of every reverse osmosis water filter is a semi-permeable membrane with extraordinarily tiny pores approximately 0.0001 microns in size. To put this in perspective, these pores are so small that they primarily allow only water molecules to pass through, while blocking larger molecules, including bacteria, viruses, minerals, and other contaminants. RO membranes can remove an impressive 95-99% of dissolved salts and contaminants from water.
Unlike standard filtration that relies on straining or size exclusion with pores of 0.01 micrometres or larger, reverse osmosis uses nanofiltration with pores about 0.001 micrometres in size. This distinction is crucial because RO operates through solvent diffusion across the membrane rather than simple mechanical straining.
Most residential RO systems feature multiple filtration stages. Initially, water passes through pre-philtres, including sediment and carbon philtres, which remove larger particles, chlorine, and organic matter that could damage the delicate RO membrane. Subsequently, high pressure pushes the water through the semi-permeable membrane, typically configured in spiral-wound or hollow-fibre designs.
The purified water (permeate) collects in a storage tank, while the concentrated contaminants (called brine, reject, or concentrate) are flushed away. Notably, this process generates about 3-4 gallons of wastewater for every gallon of purified water. Finally, the clean water often passes through a post-filter to remove any residual taste before reaching your tap.

The Benefits of Using Reverse Osmosis

Here are just some of the many reasons why homeowners and businesses are choosing to invest in a reverse osmosis water filter.
· Reverse osmosis water filters deliver exceptional value for money, as they are the most economical method of removing contaminants from your drinking water. This remarkable efficiency makes RO technology increasingly popular among homeowners seeking pure water without the ongoing expense of bottled alternatives.
· One of the most compelling advantages of reverse osmosis is its ability to eliminate an impressive range of harmful substances. These systems effectively reduce bacteria, viruses, protozoa, and an extensive list of chemical contaminants. The semi-permeable membrane rejects nearly all (>99%) strongly ionised polyvalent ions while removing approximately 95% of weakly ionised monovalent ions like sodium.
· RO systems excel at removing numerous harmful substances from your water, including:

• Lead (up to 98%)
• Fluoride (85-92%)
• Chlorine (up to 98%)
• Heavy metals like arsenic, cadmium, and copper
• “Forever chemicals” such as PFAS, PFOS, and PFOAs (99%+)

· Beyond purification capabilities, these systems dramatically improve taste. When minerals and impurities are stripped away, you’ll enjoy a more revitalising drinking experience. This enhanced flavour extends to cooking as well; many restaurants now use RO water to wash ingredients and prepare food, allowing the true flavours of ingredients to shine.

· From a practical standpoint, reverse osmosis offers greater convenience than pitcher filters, as they only need changing once or twice annually, saving you both time and effort. Additionally, for a household that might otherwise purchase bottled water at approximately £7.15-10 per gallon, an RO system delivers filtered water for just a few pence per gallon.
As a result, most experts agree that reverse osmosis water filtration represents the best solution for almost every domestic situation when specific contaminant removal is required.

Is Reverse Osmosis the Right Choice for Your Needs?

Determining whether a reverse osmosis system is the right choice for your home depends on several key factors related to your water quality and specific needs. First and foremost, you should consider the current quality of your local water supply.
If you’re on public tap water in the UK that meets drinking water standards and lacks obvious impurities or odours, you might not need an RO system. Nevertheless, for households with contaminated water sources or specific health concerns, reverse osmosis offers significant advantages.
In particular, reverse osmosis becomes a wise choice if you’re concerned about:
• PFAS (per- and polyfluoroalkyl substances)
• Fluoride removal
• Heavy metals contamination
• Extremely high mineral content (TDS levels above 500)
For households relying on well water with high levels of contaminants like arsenic or nitrates, an RO system might be your only viable option. Similarly, if you live in an older building with questionable plumbing, a reverse osmosis filter can effectively address potential lead contamination.
It is also worth considering the costs as reverse osmosis systems generally start from £250, plus ongoing maintenance expenses and this investment must be weighed against your specific water purification needs.
The decision ultimately comes down to your priorities. For families particularly concerned about water purity, health implications, and environmental impact, reverse osmosis offers peace of mind that few other systems can match. Whether you choose reverse osmosis or another filtration method, taking steps to ensure your drinking water quality remains an important investment in your family’s health and wellbeing.
To determine if you genuinely need reverse osmosis, arrange a comprehensive water test to analyse your water’s composition. This will reveal contaminant levels and help you make an informed decision. If you would like to find out more about the water hygiene services, we provide at Lubron then please get in touch and a member of our team will be happy to help answer any questions you may have.