How to Install a Water Filtration System

20 March 2025

Clean, safe drinking water is essential for any home, and installing a water filtration system can help remove contaminants, improve taste, and provide peace of mind. Many homeowners wonder whether they can install a water filter themselves or if they should call in a professional like PM247. In this guide, we’ll explore how to install a water filtration system, the costs involved, and the best filtration methods for home use.

(Image courtesy of Puriflow Filters)

Can I Install a Water Filtration System Myself?

The short answer is: yes, you can install a water filtration system yourself, depending on the type of system you choose. Some water filters, such as jug filters or tap-mounted units, require no installation at all. Others, like under-sink filters and whole-house systems, involve more complex plumbing work and may require professional help to ensure they function correctly.

If you’re confident with basic DIY plumbing tasks, you may be able to install an under-sink water filter or even a whole-house system by following the manufacturer’s instructions. However, improper installation can lead to leaks, broken taps, water pressure issues, cloudy water and/or reduced filter performance. If you’re unsure, a professional plumber from Property Maintenance 247 can ensure the job is done correctly and efficiently.

 

Choosing the Right Water Filtration System

Before installation, it’s important to choose the best filtration method for your home. Different types of water filtration systems serve different needs:

1. Activated Carbon Filters

• Best for: Removing chlorine, sediment, and bad taste/odour.
• Common in: Tap-mounted filters, under-sink systems, and whole-house filters.

2. Reverse Osmosis (RO) Systems

• Best for: Removing heavy metals, fluoride, nitrates, and other contaminants.
• Common in: Under-sink systems with separate taps.

3. UV Water Purifiers

• Best for: Killing bacteria and viruses.
• Common in: Whole-house systems and well water treatment setups.

4. Whole-House Filtration Systems

• Best for: Treating all water entering your home.
• Common in: Homes with well water or concerns about multiple contaminants.

5. Water Softeners

• Best for: Removing hard water minerals (calcium and magnesium) that cause limescale.
• Common in: Areas with hard water problems.

 

Trouble understanding which water filtration is best for you? Contact PM247 for expert advice and installation by clicking contact us or by calling our number: 08082 504 203

 

How to Install an Under-Sink Water Filter

Installing an under-sink water filter is a manageable DIY project if you have basic plumbing knowledge. Here’s how to do it:

Tools and Materials Needed:

• Adjustable spanner
• Drill (if mounting the filter)
• PTFE tape
• Bucket/towel (for catching leaks)
• Under-sink filtration system

Step-by-Step Installation Guide:

1. Turn Off the Water Supply
   • Locate the shutoff valve under the sink and turn it off.
   • Open the tap to drain any remaining water.
2. Choose a Mounting Location
   • Most under-sink filters come with a bracket for wall mounting.
   • Select a location that allows easy filter changes.
3. Disconnect the Cold Water Line
   • Use an adjustable spanner to disconnect the cold water supply hose.
   • Place a bucket underneath to catch any residual water.
4. Install the Filter System
   • Attach the filter’s inlet hose to the cold water valve.
   • Connect the outlet hose to the tap supply line.
   • Use PTFE tape on the connections to prevent leaks.
5. Turn the Water Back On and Check for Leaks
   • Slowly turn the water supply back on.
   • Run the tap and check for leaks at all connection points.
6. Flush the System
   • Run water through the filter for 5-10 minutes to remove any trapped air and initial carbon dust.

 

How to Install a Whole-House Water Filtration System

Whole-house systems are more complex and typically require professional installation. However, if you’re a skilled DIYer, you can follow these steps:

Tools and Materials Needed:

• Pipe cutter
• Spanners
• PTFE tape
• Whole-house filtration system
• Shutoff valves

Step-by-Step Installation Guide:

1. Turn Off the Main Water Supply
2. Cut into the Main Water Line
3. Install Shutoff Valves on Both Sides of the Filter
4. Connect the Filtration Unit Using Compression Fittings
5. Turn the Water Back On and Check for Leaks
6. Flush the System

Given the complexity of cutting into your main water line, we highly recommend professional installation from PM247 for whole-house systems.

 

How Much Does It Cost to Have a Water Filter Fitted?

The cost of installing a water filtration system depends on the type of filter and whether you hire a professional. Here’s a rough guide:

• Tap Filters: £20 – £50 (self-install)
• Under-Sink Filters: £50 – £300 (self-install) / £100 – £200 (professional installation)
• Reverse Osmosis Systems: £150 – £600 (self-install) / £200 – £500 (professional installation)
• Whole-House Filtration Systems: £300 – £2,000 (self-install) / £500 – £2,500 (professional installation)

At PM247, we provide expert plumbing services to ensure your water filtration system is installed correctly, saving you time and preventing costly mistakes.

 

Should You Install a Water Filtration System Yourself or Call a Professional?

For simple filters like tap or under-sink models, DIY installation is possible if you’re comfortable with plumbing work. However, for complex systems like reverse osmosis or whole-house filtration, professional installation is recommended to ensure proper function and compliance with plumbing regulations.

Benefits of Hiring a Professional Plumber:

• Expert installation – Ensures no leaks or water damage.
• Efficiency – Faster and hassle-free setup.
• Warranty Protection – Some manufacturers require professional installation to maintain warranty coverage.
• Compliance – Meets local plumbing codes and regulations.

Here’s what a happy PM247 customer had to say about our services:

 

Final Thoughts from PM247

Installing a water filtration system in your home is a great way to ensure clean and safe drinking water. While some systems can be installed with basic DIY skills, others require professional expertise. If you’re unsure about the process or need help choosing the right system, PM247’s experienced plumbers are here to assist.

Fill in the form or call us on 08082 504 203 and contact us today for expert advice and hassle-free installation!

Plumbing Services in your area: Bath, Bedfordshire, Berkshire, Bristol, Buckinghamshire, Essex, Gloucestershire, Hampshire, Hertfordshire, Kent, London, Oxfordshire, Surrey, Warwickshire and West Midlands

 

Note: All quotes prices are estimates and will vary depending on what system you choose to buy and the scope of the works.