Home Reverse Osmosis System

Culligan UK’s under-sink water filtration systems ensure safe, clean and delicious tap water for you and your family.​

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Clean, pure, great-tasting water straight from the tap
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Reduces bacteria, viruses & microorganisms in drinking water
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Multi-stage filtration process
Personalised advice
Ongoing aftercare
Innovative products

Safe water, always​

Innovation in every sip of water​

Culligan employs cutting-edge filtration and purification techniques to guarantee your water’s safety, cleanliness, and exceptional taste.​

  • We provide a variety of advanced filtration options, including reverse osmosis and carbon filtration.
  • With reverse osmosis, you can enjoy water that’s exceptionally pure and free from contaminants.
  • And carbon filtration systems effectively remove chlorine, resulting in water that tastes better for drinking and cooking.​

Convenient & sustainable​

Enjoy clean, filtered water at your fingertips​

Experience top-quality, filtered water for your drinks and meals. Say goodbye to bottled water, saving money and helping the environment by reducing single-use plastic waste.​

With our systems, you can savour the pure, refreshing taste of water without any lingering aftertaste, making staying hydrated an even more enjoyable experience for your family.​

person filling glass of tap water

What is Reverse Osmosis (RO)?

RO Purification

  • Reverse Osmosis is a water purification process that facilitates the removal of up to 99% of impurities, including chlorine, heavy metals, and harmful chemicals.
  • Semi-permeable membranes are used to filter the water that passes through, delivering safe, odourless water to your tap.
  • Eliminates the need for single-use plastic water bottles, saving you money and is eco-friendly.
  • With reverse osmosis, you can enjoy water that’s exceptionally pure and free from contaminants.

Under Sink RO Water System

Introduce one of our high-quality home water filtration systems to guarantee clean, pure water for your home.

Culligan Intense
Click & Drink
Wireless technology
For drinking and cooking
Eliminates chlorine and bacteria
Culligan Product
AC Slim RO
Reverse Osmosis system
Culligan pure ultrafiltration
Carbon block filter
So Clear
No need for electricity
Multi-stage filtration process
Compact size fits most kitchens

Get started in 3 easy steps

Get in touch

Reaching out to us is the first step towards improving the water in your home. You can contact us via our online enquiry form.


Our friendly team is ready to assist you with any questions you may have and guide you through the process.​

Personalised quote

Once you’ve contacted us, we’ll work closely with you to understand your specific needs and requirements.


We’ll then provide you with a personalised quote tailored to your needs. Our transparent pricing ensures that you know exactly what to expect, with no hidden surprises.


Once you’ve accepted your quote, our expert installation team will schedule a convenient time to install your system.


Rest assured that our skilled technicians will handle the installation process efficiently, ensuring that your system is up and running smoothly in no time. ​

How does a Culligan water purifier work?

Experience the efficiency of Culligan’s water purifiers featuring high-performance filtration, powered by activated carbon or reverse osmosis. Water, purified for peace of mind.

These compact units easily fit under your sink and connect to your cold-water supply, ensuring all your tap water is treated, eliminating contaminants and hard water.

Our Click & Drink technology simplifies things. A wireless button near your sink lets you switch between filtered and unfiltered water effortlessly. No more plastic bottles or filter jug refills. It’s convenient and eco-friendly.​

Want to know more? Speak to our experts today.​

Flexible purchasing options available

When you rent

  • Save on initial expenses compared to buying a water filtration system outright.​
  • Enjoy worry-free installation to ensure your system is set up correctly.
  • Maintenance, repairs, and replacements, all included for your peace of mind.​

When you buy

  • Although the initial expense might be higher than renting, there are no continuous rental fees.​
  • Purchasing grants you complete ownership and authority over your water system.​
  • A permanently installed water purification system can add value to your home.​

We are

Culligan delivers innovative, high-quality water solutions to both UK households and businesses, serving over 6 million homes and supplying 2.5 million offices.

With a presence in more than 900 locations worldwide and 85+ years of experience, our mission is clear: to provide superior and sustainable drinking water for everyone, whether at home, at work, or on the go.​


Water filtration system service & maintenance

Experience hassle-free installation and upkeep of your new water filtration system with our team of expert engineers, offering nationwide coverage across the UK.

Mechanics keys


Trust our skilled technicians with years of experience in installing under-sink water filtration systems. We deliver a friendly and efficient service and can schedule installations to suit your needs.



We carry out meticulous sanitation to ensure flawless, trouble-free operation of your water system. Our proactive maintenance approach ensures consistent performance for your peace of mind.

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If you encounter any issues, reach out to our customer service team, and we’ll promptly address them by repairing or replacing your filtration system. Our comprehensive service ensures your home’s filtration remains in top working condition.

Frequently asked questions

How does an under-sink water purification system work?

Culligan’s systems employ either activated carbon or reverse osmosis membranes to eliminate impurities and contaminants from your tap water.​

As your water flows through these filters, they capture and diminish common pollutants, delivering cleaner, purer water right from your tap.

​ What types of contaminants can an under-sink water filtration system remove?​ ​

Our systems efficiently eliminate various contaminants such as chlorine, sediment, heavy metals (e.g., lead and copper), bacteria, viruses, pesticides, and diverse chemicals.​

The specific contaminants removed vary based on the filter type within your system.

Is professional installation required for under-sink water filtration systems?

We highly recommend professional installation to guarantee accurate placement, secure, leak-free connections, and peak performance.​

​Additionally, a professional installer can assist in selecting the ideal location for your system. Our Culligan engineers bring years of expertise in installing various home water systems.

Is it possible to have both an under-sink water filtration system and a water softener?

Yes! Under-sink water filtration systems elevate the quality of your drinking water, while water softeners efficiently tackle hard water concerns such as limescale buildup, water spots on dishes, and dry skin.​

​This combined setup ensures comprehensive water quality enhancement for all your needs: cleaning, bathing, cooking, and drinking.

Are under-sink water filters environmentally friendly?

If you’re looking to make your home more environmentally conscious, consider beginning with under-sink water filtration.​

​By offering a practically limitless source of filtered water at home, this method diminishes the need for disposable plastic water bottles.​

​With Culligan water solutions, an estimated 40 billion plastic bottles are saved from global landfills each year.​

Here’s what our customers say about us

Get in touch with our experts

Please fill out this form so that we can contact you abour your enquiry. You can also arrange for a free personalised water analysis in your home or through a virtual online demonstration.

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