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Mains Water Filter

Mains Water Filters For Cleaner Water Throughout Your Home

Improve the taste, smell and quality of your household water with a mains water filter designed for UK homes.

A mains water filter connects to your water supply to reduce common issues such as chlorine taste, odour, sediment and unwanted contaminants before the water reaches your tap. Whether you need a simple drinking water upgrade, a countertop dispenser, a whole house filter or a water softener for limescale, Regal Flow can help you choose the right system.

Browse our mains water filter range below, or compare related options including countertop water dispensers, whole house filters and water softeners.

What Is A Mains Water Filter?

A mains water filter is a filtration system connected to your household water supply. Depending on the system, it can filter water for one tap, one appliance, a kitchen area or the whole property.

The right system depends on what you are trying to solve. If your water tastes strongly of chlorine, a carbon based filter may be enough. If you want highly purified drinking water, reverse osmosis is the stronger option. If you want filtered water for every tap, a whole house filter is usually more suitable.

Which Type Of Mains Water Filter Do You Need?

Filter Type Best For Where It Fits
Under Sink Water Filter Improving drinking and cooking water from the kitchen tap Under the kitchen sink
Countertop Water Dispenser Renters, offices and homes wanting filtered water with no plumbing Kitchen worktop or office counter
Whole House Filter Filtering water for taps, showers, baths and general household use Main incoming water supply
Reverse Osmosis System High purity drinking water and stronger contaminant reduction Under sink or countertop
Water Softener Limescale, hard water marks and appliance protection Main incoming water supply

Filter Or Softener? Do Not Buy The Wrong System

This is where many people make the wrong purchase. A mains water filter improves water quality by reducing taste, odour, chlorine, sediment and selected contaminants. A water softener tackles hardness minerals that cause limescale.

If your issue is chlorine taste, smell or general drinking water quality, choose a water filter. If your issue is scale on taps, kettle build up, shower screen marks or appliance damage, look at our water softeners.

Common Water Problems A Mains Water Filter Can Help With

Chlorine Taste And Smell

Carbon filtration can reduce the chlorine taste and smell often found in treated mains water.

Sediment And Particles

Some systems reduce visible particles, grit and sediment before water reaches your taps.

Poor Drinking Water Taste

A drinking water filter or reverse osmosis system can make water taste cleaner and fresher.

Whole Home Water Quality

A whole house filter can improve the water used for washing, bathing, showering and cleaning.

Mains water filter installed under a sink

Best Mains Water Filter By Use Case

Best For Drinking Water

For drinking and cooking water, an under sink filter or reverse osmosis system is usually the best choice. These systems focus on the water you actually consume and can deliver a cleaner taste than standard tap water.

Best For Renters Or No Plumbing

If you cannot drill, modify plumbing or install a permanent system, choose a countertop water dispenser. These are ideal for rented homes, offices, caravans and smaller kitchens.

Best For The Whole Property

If you want filtered water for every tap, shower and bath, a whole house water filter is the better route. These systems are fitted at the main supply and treat water before it moves around the home.

Best For Limescale

If your main problem is hard water, scale build up, white marks or appliance damage, a mains water filter alone is not enough. You need a water softener.

Mains Water Filter Installation And Cost

Installation depends on the type of filter you choose. Countertop systems usually need no installation. Under sink filters require basic plumbing. Whole house filters and water softeners should normally be fitted by a competent installer because they connect to the main incoming water supply.

The total cost depends on the product, installation complexity, cartridge replacement schedule and whether additional parts are required. The cheapest option is not always the best value. A poorly matched system can create low flow, poor performance or ongoing maintenance frustration.

What To Check Before Buying

  • Your main water problem, such as chlorine, taste, sediment or limescale
  • Whether you need drinking water only or whole home filtration
  • Available space under the sink, on the counter or near the incoming mains
  • Water pressure and flow rate requirements
  • Replacement filter cost and expected lifespan
  • Whether installation is required
  • Whether you rent or own the property

Need Help Choosing The Right Mains Water Filter?

Unsure whether you need a drinking water filter, countertop dispenser, whole house filter or water softener? Speak directly with our team for clear advice before placing your order.

Contact Support Team

✉ Email Support: info@regalflow.co.uk

☎ Telephone Direct: 0121 630 1130

◉ WhatsApp Chat: Click here to message our technical team instantly

Frequently Asked Questions

Are mains water filters worth it?

Yes, if you want better tasting water, reduced chlorine smell, fewer particles or more confidence in the water you use every day. The key is choosing the right filter type for the problem you want to solve.

Do mains water filters remove chlorine?

Many carbon based mains water filters are designed to reduce chlorine taste and odour. Performance depends on the filter media, water flow and cartridge condition.

Do mains water filters remove limescale?

Standard mains water filters do not usually solve limescale. For limescale, hard water marks and appliance scale protection, choose a water softener.

What is the difference between a mains water filter and reverse osmosis?

A general mains water filter improves water quality using media such as carbon or sediment filtration. Reverse osmosis uses a fine membrane to reduce a wider range of dissolved impurities, making it a stronger choice for high purity drinking water.

Can I filter the water for my whole house?

Yes. A whole house filter is fitted near the incoming water supply and filters water before it reaches taps, showers, baths and appliances.

Which mains water filter is best for UK homes?

There is no single best option for every home. For drinking water, consider under sink or reverse osmosis systems. For renters, consider countertop dispensers. For whole home water quality, consider whole house filters. For limescale, choose a water softener.

How often do filter cartridges need replacing?

Replacement frequency depends on the filter type, usage and incoming water quality. Always check the product specification and replace cartridges on schedule to maintain performance.

Can I install a mains water filter myself?

Some simple systems can be installed by a confident DIY user, but under sink and whole house systems are usually best fitted by a competent plumber to avoid leaks, pressure issues or incorrect setup.

Related Water Treatment Collections

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Need help choosing the right product or guidance on installation?
For any inquiries, feel free to call us at 0121 630 1130 or email info@regalflow.co.uk - we are a friendly team !
Contact Us
a male and female customer support agent at a esk
Need help choosing the right product or guidance on installation?
For any inquiries, feel free to call us at 0121 630 1130 or email info@regalflow.co.uk - we are a friendly team !
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