5 Best Water Treatments in London for Clearer, Softer, Better-Tasting Water
A stubborn white crust on the kitchen faucet became an exhausting weekly chore last year. London tap water carries heavy minerals that leave strange metallic tastes and destroy expensive plumbing fixtures.
Left untreated, hard water damage can force emergency boiler repairs when internal pipes completely clog with limescale. A proper softening unit protects valuable home appliances and makes daily hydration much more pleasant.
I wanted to bypass pushy salespeople and locate genuine plumbing experts, so I contacted local technicians and talked to residents about their water quality to uncover the best water treatments in London.
Below are the ones that stood out the most!
How much do water treatments cost in London?
Installing a home filtration or softener system in London typically costs £500 to £3,000. Reverse osmosis systems can reach £5,000.
| System Type | Purpose & Benefits | Average Cost (Installed) |
| Water Softeners | Removes hard minerals to stop limescale | £540 to £2,900 |
| Filtration Systems | Uses carbon filters for better taste | £800 to £3,000 |
| Reverse Osmosis | High-purity contaminant removal | £1,000 to £5,000 |
| Ultraviolet (UV) Treatment | Chemical-free bacteria elimination | £500 to £2,000 |
1. The London Water Company Ltd
Website: https://londonwater.co.uk/
Address: The Avenue (off Friern Barnet Road), New Southgate, N11 1NF
Contact: 020 8441 1222
Hours: Monday-Friday: 9:00 AM-5:30 PM; Saturday: 9:00 AM-1:00 PM; Sunday: Closed
The London Water Company Ltd is an independent family business. They’ve sold water softeners and drinking water products for over 40 years, supplying premium models like the Kinetico Infinity and TwinTec systems.
I like that manufacturer-trained service engineers handle repairs and routine servicing. That keeps your system running well for years.
I also like that you can choose single tank or timer-controlled options for your home.
They also deliver block salt straight to your door. That’s handy because you won’t have to carry heavy bags from the supermarket.
Clients I spoke with also said the installers do a tidy and professional job. One even mentioned that the installer handled a really hard wall to drill through.
The downside is their focus. They lean toward water softening over broader home filtration.
Their location is another catch. It means longer trips if you live in South London.
£1200 for softener and £300 for installation.
Helpful guys in the shop, the place does need a woman touch. The road is under restrictions because it has a school. I quickly drive into the yard if no parking outside. I did read their salt is at reasonable price. They help me decided on the water softener, the installer had a quick look if it can be fitted. Couple of weeks later he fitted in around 6 hours, really hard wall to drill through. Did a tidy job, nice plumber. £1200 for softener and £300 for installation.
North London | Google Review
The installation was very professional, the team knew their stuff
I had a water softener installed by them back in November. The installation was very professional, the team knew their stuff when talking with them on the phone beforehand and it’s been working flawlessly since. I referred a friend to them and they were honest that his property wasn’t appropriate given the layout, instead of attempting an install and making a mess of the thing
Ethan Katzenberg | Google Review
2. London Water Filter
Website: https://londonwaterfilter.co.uk/
Address: 21 Upper Tulse Hill, SW2 2SD
Contact: 07960 036327
Hours: Monday-Thursday: 9:00 AM-5:00 PM; Friday: 7:00 AM-5:00 PM; Saturday: 9:00 AM-5:00 PM
What stands out to me about London Water Filter is its promise of clean pipework. It also guarantees professional commissioning by experienced engineers.
It’s an authorised Waterdrop dealer and stocks major brands like Brita.
They don’t use subcontractors either, so the same team handles your installation. They install systems across all thirty-three boroughs.
I also like the detailed Total Dissolved Solids (TDS) testing before and after the job. You get a written quality report that shows the exact difference in your water.
One local customer shared that the team takes the time to explain all the filtration options clearly. They also walk you through how everything works before they leave.
Just note that the initial water assessment costs £120.
Scheduling can be tricky too. Their wide coverage area sometimes causes booking conflicts in busy seasons.
Leo and the London Water Filter team were very helpful and informative.
Leo and the London Water Filter team were very helpful and informative. They explained the different water filtration options and recommended the best water filter system.
The installation was completed quickly and professionally, and they showed us clearly how everything works.
Kelly Pereira | Google Review
The quality of the systems is top-notch.
London Water Filter’s advice was spot on, and the installation was quick and professional. The quality of the systems is top-notch. If you’re looking for reliable, high-quality water filtration, they’re definitely the ones to go to!
Sara | Google Review
3. Our Taap
Website: https://ourtaap.com/
Address: 79-81 Paul Street, EC2A 4NQ
Contact: 020 7022 6471
Hours: Phone: Monday-Friday, 9:00 AM-5:30 PM; WhatsApp/Live Chat: Monday-Friday, 9:00 AM-8:00 PM; Weekends and Bank Holidays, 10:00 AM-7:00 PM
If you like the idea of a subscription, Our Taap might suit you. It’s a hydration brand with a patented triple filtration system.
The system features MAZE membrane technology and UV purification. This compact setup removes harmful contaminants. It also keeps the natural minerals in your water.
What’s also reassuring is that their own engineers handle every installation from day one.
I also like that your monthly subscription covers filter replacements and routine maintenance. One simple payment plan means no surprise bills.
I actually found out about them because several homeowners I spoke with highly recommend the team and the experience. I think that’s a good sign for long-term hydration needs.
However, their services are subscription-based, so you’ll need a plan to use them.
Phone support is also unavailable on weekends. You’ll need to use WhatsApp or live chat instead.
I highly recommend both Darren and Our Taap.
Excellent service from start to finish. Darren did an amazing job installing our water system. He was very professional, friendly, and took great care with everything. He worked very hygienically, kept everything clean throughout the installation, and left the area exactly as he found it. The installation was neat and tidy, and he explained everything clearly. I highly recommend both Darren and Our Taap. Thank you, Darren! ⭐⭐⭐⭐⭐
Wercorys Correia | Google Review
I couldn’t be happier with the experience.
Darren came to my home today to install a filtered water system, and I couldn’t be happier with the experience. He was quick, professional, reliable, and kept everything very clean throughout the process.
The difference in the water is incredible—the taste is noticeably better, and having instant hot water is so convenient. Even my tea and coffee taste so much richer now.
Highly recommended!
Maryam Eftekhari | Google Review
4. West London Water Softeners
Website: https://westlondon-watersofteners.co.uk/
Address: 30 Orchard Rd, Kingston upon Thames KT1 2QW, United Kingdom
Contact: 020 3051 7306
Hours: Monday-Friday: 9:30 AM-5:00 PM
More than twenty years of domestic plumbing and installation experience sits behind West London Water Softeners.
They specialise in premium TwinTec and Kinetico twin-cylinder systems. These non-electric units use a simple ion-exchange process to soften your supply.
I like that the company gives you a fixed quotation before you decide to proceed. They also back their work with a two-year labour warranty.
A homeowner I spoke with said their installation was quick and tidy. Another shared that the price was fair, and even praised the installer’s professionalism.
Feedback like that builds trust for me, especially for a job that touches your plumbing.
Their focus on softening does limit your options. Catalogue prices may also change without prior notice, so confirm your quote before you commit.
The installation was quick, tidy, and very professional.
The installation was quick, tidy, and very professional. Since having the water softener fitted, the difference has been noticeable straight away—less limescale, better water quality, and even things like washing up and showering feel better condition for my hair follicles.
Daniel Jarvis | Google Review
Wouldn’t hesitate to recommend Nick to anyone looking for a reasonable price and a knowledgeable installer.
Gave us more confidence when he came for a survey and walked us through what was possible and what wasn’t. Finally installation was efficient, cleaned up after he was done and explained the whole system. Wouldn’t hesitate to recommend Nick to anyone looking for a reasonable price and a knowledgeable installer.
Nilesh N | Google Review
5. DS Water
Website: https://www.dswater.co.uk/
Address: G16, The Lightbox, 111 Power Rd, W4 5PY
Contact: 020 3633 6064
Hours: Monday-Thursday: 8:00 AM-6:00 PM; Friday: 8:00 AM-4:00 PM; Saturday-Sunday: 7:00 AM-3:00 PM
What I like about DS Water is that they provide cost-effective treatment for both residential and commercial properties.
Their bespoke hygiene contracts can also be tailored to specific safety regulations, which is useful for properties with strict compliance needs.
Their technicians handle more complex remedial work too, including calorifier inspections and tank upgrades. That helps keep properties fully compliant with Legionella requirements.
They’re particularly well suited to larger properties. They offer large-scale reverse osmosis systems, UV disinfection units, and high-capacity softening solutions that help protect bigger plumbing networks.
The main limitation is their scope. They aren’t focused on one-off household products, so simple domestic drinking filter installations aren’t really their strength.
Thank you once again to the whole team for such brilliant service.
Excellent company. Got a duplex softener installed in my unit.
James answered all my questions very quick and it qas all done within a week of me confirming.
Mitch and his colleague who installed my softener were excellent.
Would highly recommend.
Thank you once again to the whole team for such brilliant service.
Nabz | Google Review
I would definitely use you again!!
I met with two of the team Sam and Alex bright and early, so helpful, professional, they got the job done, you wouldn’t have known they were even in the building.
Very reasonably priced too.
Thank you guys…
I would definitely use you again!!
Jo Maskell | Google Review