Best Reverse Osmosis System UK

Today on Water Filter Geek we’ll be checking out the best reverse osmosis system UK.

If you’re reading this article then you probably already know a little about reverse osmosis filter systems. You’ll probably be aware that these systems can completely transform the quality and taste of your house’s water supply.

We run our expert eye over the best ones on the UK market, today in 2024. We’ll look at what’s good and what’s not so good about each product in particular.

And we’ll let you know what type of system is the right one for you, for your particular water consumption needs and for the water set-up in your home.

Best Reverse Osmosis System UK

Best Reverse Osmosis System List

Here are the basic specifications of the top reverse osmosis filter systems in the UK in 2024.

REVERSE OSMOSIS SYSTEMFrizzlife PX500-AWaterdrop G2P600 Reverse Osmosis Water Filtration System
DIMENSIONS35.6L x 45.7W x 12.7H cm49.4L x 20.6W x 45.0H cm
CAPACITY500 Gallons per Day600GPD (1500 Litres)

Reverse Osmosis System UK Reviews

Let’s go into more detail on each reverse osmosis filter.

But first…

Why are reverse osmosis systems so popular?

Most simply, it’s because people want healthier, safer water. A reverse osmosis system will remove many harmful pollutants and chemicals from your water.

Pollutants like lead, copper, mercury, nitrates, chlorine are sometimes able to find their way into our water supply, and a reverse osmosis system is the best way to get rid of them.

Normal water filters (and here are the best water filter systems UK) are nowhere near a reverse osmosis system for effectiveness at eliminating these harmful chemicals.

If you’re in a hurry, here are the best of this water filter type below:

1) Frizzlife PX500-A

Capacity (Gallons per day)500GPD
Contaminant removal (%)99.99%
Remineralizing filterYes


Very high level filtration

The Reverse Osmosis filter is at 0.0001 micron level. That’s a very high level filter, it’s going to capture pretty much everything you’d want it to.

As a result, 99.99% of contaminants are removed.

This Frizzlife reverse osmosis filter also appeared on our list of the best water filter to remove Fluoride UK).

Tankless design

Traditionally, reverse osmosis systems need a tank to store the water so it’s ready for you to take water from. The Frizzlife system has new technology that allows for a tankless design. That is, water is already ready for you to take from the tap, it doesn’t need tank.

That saves you a lot of space, this system won’t take up much space under your sink.

High capacity

The capacity is 500 gallons of filtered water per day. That’s a lot more than most people will ever need.

Remineralized water

What does that mean? It means that most lower cost reverse osmosis systems product water that is filtered but that has also removed essential minerals, like magnesium and calcium. That means the water is cleaner but is actually less healthy than before it was filtered.

The Frizzlife reverse osmosis system, however, has a filter that remineralizes the water. In other words, it alkalizes the water, by returning some essential minerals to the water that are good for health.



This is a really high-spec and high quality system that results in the best water quality you can get. And as such, it’s not cheap.

So weigh up what having better quality, healthier, safer water means to you and your household; then you can decide if it’s worth the investment.

Power connection required

The Frizzlife PX500-A needs to be connected to a power outlet. If you don’t already have that, it’s something you’ll need to install beforehand.

Where can you get it?

Here’s where to check the price on Amazon.

2) Waterdrop G2P600 Under-Sink Reverse Osmosis Water Filtration System

Capacity (Gallons per day)600 Gallons Per Day (GPD)
Contaminant removal (%)90% plus
Remineralizing filterNo


Advanced Filtration Process

The 7-stage filtration process is highly efficient at removing pollutants and unwanted chemicals, with 3 composite filters. That includes a high-efficiency membrane and activated carbon filter layer to trap these chemicals.

Filtration accuracy is excellent, reaching 0.0001 microns.

Tankless technology

Like the Frizzlife PX500-A, this Waterdrop system has tankless technology.

That means you don’t need a tank of water, which can sit gathering viruses and bacteria over time. And it means you’re saving around 50% on space.

Fast flow

Reverse osmosis systems are notorious for leaving you hanging around to wait to fill up your kettle, pot or cup. But the Watertop G2 system works quickly, no waiting around. You can get a cup of water in just 12 seconds.


High Price

It works really well to remove contaminants from your water and leave you with tastier, healthier water.

But reverse osmosis systems ain’t cheap and this model, the G2, is no different.

No remineralizing filter

There is no remineralization filter included as standard with the G2P600. For the price, we’re quite surprised about that.

That means the water you get from it has been stripped of some minerals that are good for you. Minerals like magnesium and calcium are beneficial to health.

You can buy a Waterdrop remineralization filter here, it’s pretty simple to attach. It’s not that expensive but it’s just an additional expense and hassle to attach it, at all. Why not just include it from the get-go, that’s what we’re wondering?

Where can you get it?

Check it out on Amazon here.

Anything else we should know about reverse osmosis technology?

Update July 2023:

There’s a new type of product that’s getting rave reviews, and it’s a countertop reverse osmosis filter. For more details, check out our Skuma Water Filter Review.

Best Reverse Osmosis Filter Summary

That’s it then, for the best reverse osmosis system UK. We went over what this type of water filter is and why it’s the best type of filter.

It is the best filter out there for removing harmful chemicals and pollutants. The reverse osmosis membrane is highly efficient at removing these unwanted chemicals. The ones on our list work to an ultra-high 0.0001 micron level.

The Frizzlife system even has the in-built ability to re-insert healthy minerals like magnesium and calcium, as part of the filtration process. So your water becomes not just more safe but more healthy and more tasty as well.

Here’s where to check them out:

If it’s a hard water problem you have specifically, consider also a water softener system.

Best of luck with your choice of UK reverse osmosis water filter!